Question

Fill in the blanks with missing words:
a) in human beings, the scrotal sacs have 2 - 3 degree centigrade _________________ temperature than the body cavity _______________.
b) the _____________ part of the spermatozoa provides energy for the movement.

Answer 1

Answer:1 The testes is located outside the abdominal cavity because sperm formation requires a temperature lower than the body temperature. It is because scrotum has a temperature 1-3 degree Celsius lower than the normal body temperature, which is essential for the production of sperm or male gametes

2 Back and forth movement of the tail results from a rhythmical longitudinal sliding motion between the anterior and posterior tubules that make up the axoneme. The energy for this process is supplied by ATP produced by mitochondria. The velocity of a sperm in fluid medium is usually 1–4 mm/min.