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KonstantinChe [14]
3 years ago
8

"Explain the process of how the human circulatory system delivers blood that is rich with oxygen to all parts of the body and th

en returns the blood to the lungs and completes this cycle over and over" "Please name 5 parts of the digestive system and explain the function that play in the digestion of food in the human body."
Biology
2 answers:
bearhunter [10]3 years ago
4 0

Answer:

it goes from aorta to theungs and down to the lower extremeties and back through the heart and lungs and circulates all day

bolus

throat

tongue

upper GI

lower gi

yKpoI14uk [10]3 years ago
3 0

Answer:

The human circulatory system is involved in the pumping blood from the heart to the different parts of the body. It consists of the heart and the blood vessels.

Blood rich in oxygen from the left atrium move into the left ventricle of the heart and is pumped into the aorta, which is a very large and elastic artery. The aorta carries the oxygenated blood to the thoracic and abdominal cavities where they are supplied to all organ systems by the arterial branches from the aorta.

Tisusue metabolism in the organ systems causes low content of oxygen and high content of CO2. This blood is called deoxygenated blood and is returned to the right atrium of the heart. The blood then enters the right ventricle. It is pumped into the pulmonary trunk and arteries. The blood is then transported to the lungs where gaseous exchange occurs between the lung capillaries and the alveoli of the lungs.

The oxygenated blood is then transported to the organ systems and the cycle continues.

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The semilunar valves of the heart open at the onset of the ejection period. Approximately what percentage of the stroke volume i
mr Goodwill [35]

The percentage of the stroke volume is ejected during the first quarter of systole will be approximately 60% to 65%

<u>Explanation:</u>

The time interval between the atria contraction and the relaxation of ventricles are called as a Cardiac cycle. Systole denotes the heart contraction during the blood pumping. Diastole refers to the heart relaxation when the blood is filled in the heart chambers. The total blood is not fully pumped by the ventricles.

Instead they will pump only a proportion of blood in each of the cardiac cycle.  The ejection fraction refers to the proportion of the intraventricular volume that is received as a output in circulation process. A human with normal heart functioning can have approximately 60-65%. This is known to be stroke volume. The blood volume that is ejected is strove volume.

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3 years ago
What is the building block of nucleic acids
Alexus [3.1K]

Answer:

Nucleotides are the smaller parts of the nucleic acids

Explanation:

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3 years ago
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What day and time did human ancestors first evolve on the "cosmic calendar"?
ycow [4]
Hi , the answer is December 31st around 10;30pm.
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3 years ago
In order to make a protein the messenge on DNA must be converted to what?
Soloha48 [4]

Explanation:

-mRNA or messenger RNA

DNA wound into chromosomes within the nucleus is unwound, unzipped and read by enzymes in a complex series of steps known as transcription. The message on DNA, called genes is copied by RNA polymerase, to form mRNA complementary sequence to that of the DNA strand.

Further Explanation:

Nucleic acids are comprised of smaller units called nucleotides and function as storage for the body’s genetic information. These monomers include ribonucleic acid (RNA) or deoxyribonucleic acid (DNA). They differ from other macromolecules since they don’t provide the body with energy. They exist solely to encode and protein synthesis.

  • Basic makeup: C, H, O, P; they contain phosphate group 5 carbon sugar, these nitrogen bases which may contain single to double bond ring.

Nucleic acids like DNA stores all of an organism’s genetic information. Nucleic acid molecules comprise the nitrogenous bases Guanine, Adenine, Cytosine and Thymine. Conversely, RNA nucleotides are Adenine, Guanine, Cysteine and Uracil. These pair up as base pairs due to their varied structure- largely influenced by the location of N molecule.  

In certain combinations, these bases form codons which act as instructions for protein synthesis. Codons are three nucleotide bases encoding an amino acid or signal at the beginning or end of protein synthesis.

RNA codons determine certain amino acids, so the order in which the bases occur within in the codon sequence designates which amino acid is to be made bus with the four RNA nucleotides (Adenine, Guanine, Cysteine and Uracil). Up to 64 codons (with 3 as stop codons) determine amino acid synthesis. The stop codons ( UAG UGA UAA) terminate amino acid/ protein synthesis while the start codon AUG begins protein synthesis.

Thus, these contribute to the broad diversity of living organisms, as varied combinations of these 64 codons can produce many proteins which can be organized into cells, tissues and organisms.

Learn more about transcription at brainly.com/question/11339456

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

#LearnWithBrainly

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Identify the cerebral cortex in the diagram of the brain below.
Lera25 [3.4K]

Answer:

A

Explanation:

The cerebral cortex can be described as the thin layer of the brain that covers  the outer part of the cerebrum. This layer is also made up of tightly packed neurons and can also be described as the wrinkly, outermost layer that surrounds the brain (the surface of the brain is not smooth but consist of folded bulges that is called gyri which create deep fissures called sulci). This increases the surface area and also the amount of information that is processed. It is also referred to as the gray matter and is also responsible for higher thought processes including speech and decision making

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