- Inside each follicle is an immature egg, the
- At the end of the cycle, the ____ breaks downs no longer producing progesterone or estrogen (if there is no pregnancy)
- the length of the menstrual cycle can vary from ___ to __ days
- A temperature lower than ____ is required for the development of sperm
- In the male reproductive system reproductive glands are called the ____
- ____ regulate human reproductive systems, including the production of gametes
- Sperm cells travel to the ____ and are stored
- The two vas deferens join together and entered the ____
- The anterior pituitary gland also produces
- In the female reproductive system, egg cells are produced in ____
- Deoxygenated blood flows from the ____ into the ____ and is pumped into the _____ that lead to the ____
- During diastole, the heart appears ____, and ___ valves open and ____ valves close
- Oxygenated blood flows from the ____ to the ____, then to the ____, ____, and to ____
- Platelets release chemicals that produce a protein called
- During systole, ____ valves close and _____ valves open
- Red blood cells consist of an iron-containing protein called
- Platelets collect and stick to the vessel at the site of the ____
- The rough atrium and left atrium receive blood ____ to the heart
- The heart pumps ____ blood to the body and _____ blood to the lungs
- The walls of capillaries are only ___ cell thick