2. Hattie counts 16 pulses in her wrist in 15 seconds. what is her pulse rate?
3. after blood has left the heart what must the muscle tissue do so that the Chambers can filled with blood again
4. Name one waste produced by cells 5. what are the functions of arteries, capillaries and veins 6. how are capillaries adapted to their function
7. Explain the differences in pressure between blood going away from the heart and returning to the heart
8.
List three main parts of the blood b. what
a. does each part do
c. Where are blood cells made
d. how are red blood cells adapted to their function
9. a chicken has a double circulatory system explain what this means
10. State two things that osteoblasts need to stay alive. what process do osteoblasts need these things for
11. explain why a large bone can be both strong and light
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Answers
Answer:
2.Rate is 16.
3. "Contractility" describes how well the heart muscle squeezes. After pumping, your heart relaxes and fills with blood. The muscle must be able to relax enough so that it can fill with blood properly before it pumps again.
4.Carbon dioxide
5.Capillaries connect the arteries to veins. The arteries deliver the oxygen-rich blood to the capillaries, where the actual exchange of oxygen and carbon dioxide occurs. The capillaries then deliver the waste-rich blood to the veins for transport back to the lungs and heart. Veins carry the blood back to the heart.
6.Capillaries have walls only one endothelial cell thick, meaning their walls are very thin. This makes them well adapted for gas exchange, as substances only have to diffuse over a short distance. Additionally, there are many capillaries within a capillary bed.
7.As the heart pumps, blood is pushed through the body through the entire circulatory system. Oxygenated blood is pumped away from the heart to the rest of the body, while deoxygenated blood is pumped to the lungs where it is deoxygenated before returning to the heart.
8.a.Plasma, Blood cells (RBCs and WBCs) and Platelets.
b.Plasma- The main role of plasma is to take nutrients, hormones, and proteins to the parts of the body that need it. Cells also put their waste products into the plasma.
Blood cells- Red blood cells or RBC carry oxygen to the tissues in different parts of the body. White blood cells or WBC strengthen the defence mechanism of the body by generating antibodies. The primary difference between RBC and WBC lies in their functionality. While RBC act as carriers, WBC act as creators.
Platelets - Platelets (thrombocytes) are colorless blood cells that help blood clot. Platelets stop bleeding by clumping and forming plugs in blood vessel injuries
9.It is called a double circulatory system because blood passes through the heart twice per circuit. The right pump sends deoxygenated blood to the lungs where it becomes oxygenated and returns back to the heart. The left pump sends the newly oxygenated blood around the body.
10.Components that are essential for osteoblast bone formation include mesenchymal stem cells (osteoblast precursor) and blood vessels that supply oxygen and nutrients for bone formation.
11. Bones are strong enough to support your weight, but light enough to allow movement. They protect your delicate internal organs and act as a storehouse for minerals, such as calcium. Spongy bone is lightweight and made up of a mesh of needle-like pieces of bone with large spaces between them.
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