Question

15. One cell-thick vessels are called
a) Arteries b) Veins c) Capillaries d) Pulmonary artery
16. The breakdown of pyruvate to give carbon dioxide. water and energy takes place in
a) cytoplasm. b) mitochondria. c) chloroplast d) nucleus
17. In normal expiration, the diaphragm is
a)Arehcd h) Flattened c) Perforated d) None of these 13. The correct pathway of blood in cin:uldlory SyStrm is
a)atria —s ventricles —• arteries — veins
h) ventricles —b. 3tri3 veins —..31/CriCS
veins anent S atria
d)vcins - > ventricles - > atria —. aneries

Answer 1

15. Capillaries

15. Capillaries16. mitochondria

15. Capillaries16. mitochondria17. Arched

15. Capillaries16. mitochondria17. Arched13. Option no. a

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Answer 2

Answer:

Ans-15.) Option c.)Capillaries

Ans-16.) Option b.)mitochondria

Ans.-17.) Option a.)Arechd

Ans.-13.)Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. As the ventricle contracts, blood leaves the heart through the pulmonary valve, into the pulmonary artery and to the lungs, where it is oxygenated.

So, the correct option is 'Option C'.

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