Answer:
The return of blood to the heart is assisted by the action of the skeletal- muscle pump. As muscles move, they squeeze the veins running through them. Veins contain a series of one-way valves, and they are squeezed, blood is pushed through the valves, which then close to prevent backflow.
Flowers that have both male and female parts are called <span>hermaphrodite flowers. </span>
The Americans colonies became free and independent states explanation: because they declared independence
Answer:
Matched functions of structures of male reproductive system are:
Semi vesicles: Production of fluid that nourishes sperm
Testes: Production of sperm and testosterone
Scrotum: Protection and temperature maintenance of the testes.
Penis: Delivery of sperm to female reproductive system
Epididymis: Storage and maturation of sperm