Answer:
Alveoli.
Explanation:
Respiration may be defined as the process of exchange of gases between the environment, lungs and body tissues. Energy is given off during the process of respiration.
The alveoli is a ballon like structure present in the lungs when gases are inflated in the alveoli. The alveoli increses the surface area for the exchange of gases. Oxygen is transferred in the body tissue from the alveoli.
Thus, alveoli is the main site of gas exchange in the lungs.
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Answer:
Human chorionic gonadotropin (hCG) is a hormone released from the cells of placenta. This hormone increases the stimulation of progesterone hormone.
Explanation:
Human chorionic gonadotropin (hCG) is also known as pregnancy hormone. This hormone is responsible for the pregnancy test. The hormone is released from after the embryo implantation.
Human chorionic gonadotropin (hCG) hormone is released from the placenta and the level of hormone is high in pregnant female. This hormone stimulates the secretion of progesterone hormone in the starting days of pregnancy.
Answer:The earliest stages of spermatogenesis occur closest to the lumen of the seminiferous tubules.
Explanation:
The earliest stages in spermatogenesis can be found in the basal side of the seminiferous tubule. The immature spermatides undergo differentiation. The mature spermatids are nearest to the center of the tubule but the tail extended into the lumen.
Answer:
https://static1.squarespace.com/static/594ab51229687f2da30c9f34/t/5bff0ac2758d463296b1ab57/1543441214489/Phlebotomy+Book+USE.pdf
Explanation:
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