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3 years ago

What part is made of the circulatory system on a frog ?

1 answer:

5 0

Hello There!!

<span>The blood is the circulating fluid connective tissue. It is the system of blood, heart and blood vessels. The main function of this system is to distribute the digested food and oxygen to the different parts of the body, in order to release energy to carry out life activities.
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1. Heart · Heart is triangular muscular pumping organs. · Heart of frog is situated ventrally to the liver in the pericardial cavity. · Heart is three –chambered. · Upper two chambers are called auricle sand lower one chamber is called ventricle. · Its anterior end is broader then posterior end. · The broader part anterior is known as auricle. · The posterior part is known as ventricle. · The ventricle is thick walled than auricles .right auricle is larger than left auricle.

Arterial system of frog

Blood vessels, which carry oxygenated blood away from heart to different part of the body, are called arteries. They constitute a system called arterial system. Truncus arterious gives two branches right aortic trunk and left aortic trunk. Each aortic trunk again divides into three branches- a) Carotid arch: it divides into – Lingual artery – it supplies blood to tongue and hyoid. Common carotid – it supplies blood to buccal cavity and brain. it consists swelling at the base called carotid labyrinth.

b) Systemic arch – two systemic arches move upward and then curve backward to join each other behind the heart to form dorsal aorta before meeting each other each systemic arch gives- Oesophageal artery – it supplies blood to osephagus. Occipito vertebral artery – it supplies blood to head and vertebral column. Subclavian – it supplied blood to shoulder and forelimb. From the junction of two systemic arches coeliaco – mesenteric artery arise which gives following branches. Coeliac artery arises and gives two branches – Hepatic artery artery – it supplies blood to liver. Duodenal artery –it supplies blood to duodenum. Intestinal artery – it supplies blood to small intestine (ileum). Spleenic artery – it supplies blood to spleen (meeting place of ileum and rectum). Posterior mesenteric artery- It is Long Branch and supplies blood to the rectum. The dorsal aorta runs backward and gives following branches- Gonadial artery – it supplies blood to testes and ovary. Renal artery- it supplies blood to kidney. At the end, the dorsal aorta runs posterior and bifurcates into right and left common iliac arteries. Each of iliac arteries gives Femoral artery – it supplies blood to hip and thigh. Sciatic artery – it supplies blood to lower region of hind legs. Epigastric artery- it supplies blood to urinary bladder.

c) Pulmo-cutanous arch- it divides into Pulmonary artery – it receives deoxygenated blood from different parts of the body and open into lungs. Cutanous artery- it supplies oxygenated blood to skin.

Venous System of frog

Blood vessels, which carry the deoxygenated blood from different parts of the body to the heart, are called veins. They constitute a system called venous system. Venous system of frog can be studied under too heading

A) Systemic Venous System This system includes the three large veins, which receives the deoxygenated blood from all the parts of the body and collect to the sinus venous. The three veins are- Right Precaval, Left precaval and Post cavals

1. Right and Left Precaval Vein: Each precaval is formed by the union of 3 veins External jugular vein - it is formed by the two veins. a. lingual vein – it receives deoxygenated blood from mouth and tounge. b. mandibular vein – it receives deoxygenated blood from lower jaw. innominate vein – it is formed by two veins. a. internal jugular vein- it receives deoxygenated blood from eye brain and skull. b. subscapular vein- it receives deoxygenated blood from shoulder and arm.subclavian vein- it is formed by two veins- a. brachial veins- it receives deoxygenated blood from fore limb. b. muscub cutanous vein – it receives deoxygenated blood from muscles and skin.

2. Post Caval Vein: It receives deoxygenated blood from following 3 veins. Hepatic vein- it receives deoxygenated blood from liver. Gonodial vein- it receives deoxygenated blood from gonads. Renal vein – it receives deoxygenated blood from kidney.

B) Pulmonary Venous System The pulmonary vein receives pure blood from lungs into left auricle of heart

Hope It helps!!

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Rank from the first to the last steps to describe the correct order of events of erythrocyte death.

timama [110]

Answer:

1. erythrocyte becomes trapped in the sinusoids of spleen.

2. Spleen macrophages digest the erythrocytes.

3. Hemoglobin is broken down into amino acids, iron and bilirubin.

4. Iron ions and amino acids are recycled to make new hemoglobin in red bone marrow. Bilirubin is sent to liver for excretion.

Explanation

Aging erythrocytes are trapped in the sinusoids of the spleen, where they are digested by macrophages. Within the macrophage, hemoglobin is broken down into amino acids, iron ions, and bilirubin.

Iron ions or heme ion and amino acids then move through the blood to the bone marrow, where they are recycled and used to create new hemoglobin. Bilirubin travels with the help of the blood to the liver, where it is modified and then excreted.

thus, the correct order is :

1. erythrocyte becomesrapped in the sinusoids of spleen.

2. Spleen macrophages digest the erythrocytes.

3. Hemoglobin is broken down into amino acids, iron and bilirubin.

4. Iron ions and amino acids are recycled to make new hemoglobin in red bone marrow. Bilirubin is sent to liver for excretion.

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3 years ago

15 Activation energy is the energy that a system must have before a chemical reaction can occur.?

Bezzdna [24]

Answer:

true

Explanation:

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3 years ago

Explain why plants along the road often die after the road is sprayed with a salt solution to melt ice

vovangra [49]

Explanation:

The salt solution is meant to lower the ice melting point hence keep most of the water from turning into ice even at zero degrees temperatures. The salts are dissolved in the water to form a salty solution that percolates the ground and reach plant roots. Because the salty water is hypertonic (more concentrated) to the cell cytoplasm of the plant roots, water is drawn from the plant by osmosis. This is the reversal of normal plant root absorption of water from the soil. This causes the plant root to wither and subsequently the whole plant to die. Remember in osmosis, water moves from the less concentrated solution to the more concentrated solution through a semipermeable membrane.

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3 years ago

Cystic fibrosis (CF) is one of most common recessive disorders among Caucasians it affects 1 in 1,700 newborns. What is the expe

Phantasy [73]

Answer: The expected frequency of carriers is P(Aa)=0.046.

The proportion of childs with CF is P(aa)=0.024.

25% of having a child with CF (aa).

Explanation:

Hardy-Weinberg's principle states that in a large enough population, in which mating occurs randomly and which is not subject to mutation, selection or migration, gene and genotype frequencies remain constant from one generation to the next one, once a state of equilibrium has been reached which in autosomal loci is reached after one generation. So, a population is said to be in balance when the alleles in polymorphic systems maintain their frequency in the population over generations.

Given the gene allele frequencies in the gene pool of a population, it is possible to calculate the expected frequencies of the progeny's genotypes and phenotypes. <u>If P = percentage of the allele A (dominant) and q = percentage of the allele a (recessive)</u>, the checkerboard method can be used to produce all possible random combinations of these gametes.

Note that p + q = 1, that is, the percentages of gametes A and a must equal 100% to include all gametes in the gene pool.

The genotypic frequencies added together should also equal 1 or 100%, and all the equations can be summarized as follows:

$p+q=1\\(p+q)^{2} = p^{2} +2pq+q^{2} = 1\\P(AA)=p^{2} \\P(aa)=q^{2} \\P(Aa)=2pq1$

So, there are 1700 individuals and only one is affected. Since it is a recessive disorder, the genotype of that individual must be aa. So the genotypic frequency of aa is 1/1700=0.000588.

Then, $P(aa)=q^{2}=0.000588$ . And with that we can calculate the value of q,

$P(a)=q=\sqrt{0.000588}=0.024$

And since we know that p+q=1, we can find out the value of p.

$p+0.024=1\\1-0.024=p\\p=0.976$

Next, we find out the genotypic frequency of the genotype AA:

$P(A)=p=0.976\\P(AA)=p^{2} = 0.976^{2}=0.95$

Now, we can find out the genotypic frequency of the genotype Aa:

$P(Aa)=2pq=2 x 0.976 x 0.024 = 0.046$

Notice than:

$p^{2} + 2pq + q^{2} = 1\\x^{2} 0.976^{2} + 2 x 0.976 x 0.024 + 0.024^{2} = 1$

Then, the expected frequency of carriers is P(Aa)=0.046

The proportion of childs with CF is P(aa)=0.024

If two parents are carriers, then their genotypes are Aa.

Gametes produced by them can only have one allele of the gene. So they can either produce A gametes, or a gametes.

In the punnett square, we can see that there genotypic ratio is 2:1:1 and the phenotypic ratio is 3:1. So, there is a probability of 25% of having an unaffected child, with both normal alleles (AA); 50% of having a carrier child (Aa) and 25% (0.25) of having a child with CF (aa).

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3 years ago

What is the correct term for developing

11111nata11111 [884]

Answer:

please give me brainlist and follow

Explanation:

Following fertilization the embryonic stage of development continues until the end of the 10th week (gestational age) (8th week fertilization age). The first two weeks from fertilization is also referred to as the germinal stage or preembryonic stage.

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3 years ago

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