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masha68 [24]
3 years ago
13

Plz help ASAP 2-5 question it due today I give you a Brainliest

Biology
1 answer:
Sedaia [141]3 years ago
5 0

Answer:

The first one is joint. A joint is where two bones come together. The second one is Bones. Tendons connect muscles to bones. :)

Explanation:

Hope this helps ya <3

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The structure that prevents backflow of blood into the left atrium is the . The vessel that carries oxygen-rich blood to tissues
iVinArrow [24]

Answer:

The structure that prevents backflow of blood into the left atrium is the mitral valve.

The vessel that carries oxygen-rich blood to tissues is the aorta.

The capillaries receiving blood flow from the left side of the heart are the Systemic capillaries.

The structure that is located anatomically between the aorta and the left ventricle is the Aortic semilunar valve.

Explanation:

The left atrium receives oxygen-rich blood from the pulmonary vein and passes it to the left ventricle. The back-flow of blood from the left ventricle into the left atrium is prevented by mitral which is a bicuspid valve. The vessel that carries oxygen-rich blood to tissues is the aorta.

Aorta receives oxygen-rich blood from the left ventricle and pumps it into its branches to deliver the blood to the body tissues. Systemic capillaries are the blood vessels that obtain the oxygen-rich blood from the left ventricle through the aorta. Systemic capillaries serve as the site for the exchange of gases and nutrients.

The aortic semilunar valve is located Aortic semilunar valve is the half-moon shape valve present between the left ventricle and aorta to prevent the black flow of blood to the left ventricle.

3 0
3 years ago
What term is used to describe a substance given in clinical trials that does not contain the drug?
HACTEHA [7]

Answer:

Placebo, Is used to describe a substance given in clinical trial that does not contain the drug.

Explanation:

  • Clinical trials are done to evaluate the effectiveness of a drug in treating a particular medical symptom or disease.
  • In such case a placebo is used as a control in the experiment.
  • A placebo contains all the components as the medicine except for the drug that is being tested.
  • A placebo is given to one group of patients having the symptoms for which the drug is tested while another group of patients with same symptoms are given the drug.
  • If the group that was given the drug show symptoms of cure  while the group that was given placebo does not show changes. Then the drug is said to be effective.

7 0
3 years ago
Write meaning of demoghraphy​
Monica [59]

Answer:

Demography is the study of human populations – their size, composition and distribution across space – and the process through which populations change. Births, deaths and migration are the 'big three' of demography, jointly producing population stability or change.

Explanation:

Hope it helpful

8 0
3 years ago
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The brain area that regulates activities that control the state of wakefulness or alertness of the cerebral cortex is the ______
LiRa [457]

Answer:

Hypothalamus

Explanation:

It maintains the process that leads the activation of wakefulness or alertness of the cerebral cortex

8 0
3 years ago
Which process drives darwin’s theory of evolution?
nika2105 [10]

Answer:

Natural selection

Explanation:

I did some research and got that for an answer

5 0
3 years ago
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