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ss7ja [257]
3 years ago
12

You enroll your preschool-age daughter in ballet class. At first, all of the children in the class are clumsy, and their movemen

ts are awkward. After several months of weekly lessons, you notice that most of the children are moving smoothly through their dance routines, but your daughter’s movements are still rather awkward. You talk with the instructor and ask her if maybe your daughter isn’t cut out for ballet, and should you withdraw her from class. The instructor encourages you to have her continue. From what you’ve learned this week, what is a physiological basis for having your daughter continue?
Biology
1 answer:
Ainat [17]3 years ago
7 0

The physiological basis for having your daughter continue is through the way she moves in which up until now, she hasn’t been moving smoothly like other child but rather than awkward. Through this, the mother would likely think that she should let her daughter drop out from that class because she doesn’t seem to have any improvement and if she were to have an improvement with her movements, then the mother would likely let her daughter to continue.

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At what point do the pulmonary and systemic circulation systems meet up?
Hitman42 [59]

Answer: The Heart

Explanation:

The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart. The system of blood vessels resembles a tree: The “trunk” – the main artery (aorta) – branches into large arteries, which lead to smaller and smaller vessels. The smallest arteries end in a network of tiny vessels known as the capillary network.

There are two types of blood circulatory system in the human body, which are connected: The systemic circulation provides organs, tissues and cells with blood so that they get oxygen and other vital substances. The pulmonary circulation is where the fresh oxygen we breathe in enters the blood. At the same time, carbon dioxide is released from the blood.

Blood circulation starts when the heart relaxes between two heartbeats: The blood flows from both atria (the upper two chambers of the heart) into the ventricles (the lower two chambers), which then expand. The following phase is called the ejection period, which is when both ventricles pump the blood into the large arteries.

In the systemic circulation, the left ventricle pumps oxygen-rich blood into the main artery (aorta). The blood travels from the main artery to larger and smaller arteries and into the capillary network. There the blood drops off oxygen, nutrients and other important substances and picks up carbon dioxide and waste products. The blood, which is now low in oxygen, is collected in veins and travels to the right atrium and into the right ventricle.

This is where pulmonary circulation begins: The right ventricle pumps low-oxygen blood into the pulmonary artery, which branches off into smaller and smaller arteries and capillaries. The capillaries form a fine network around the pulmonary vesicles (grape-like air sacs at the end of the airways). This is where carbon dioxide is released from the blood into the air inside the pulmonary vesicles, and fresh oxygen enters the bloodstream. When we breathe out, carbon dioxide leaves our body. Oxygen-rich blood travels through the pulmonary veins and the left atrium into the left ventricle. The next heartbeat starts a new cycle of systemic circulation. Below is an attachment of a diagram that explains the connection between pulmonary and systemic circulation from google.

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