Biology

Ovulation is the cyclical process, in which a female produces ova (eggs) in an ovary (ovarian gland/follicle), and discharges them toward the uterus via a fallopian tube in preparation for conception (about mid-cycle). This process is the underlying function of the menstrual cycle, not the bleeding which actually ends the cycle.

Chemotherapy is different than localized treatments of cancer because it is cytotoxic, or kills some of the blood cells in the body. In chemotherapy treatment, patients are given medication that travels throughout the body and destroys any cancer cells that are present.

The endocrine system affects cells with certain receptors .

The nervous system can affect only nearby cells

Some times both ovaries produce individual egg. Then both ovum gets fertilized and Fraternal twins happens

One egg from each ovary is fertilized

A longitudinal cohort study involves studying a specific group of people over an extended period of time.

HIV attacks helper T cells that are trying to fight infection, rather than attacking healthy body cells like a cold virus does.

HIV attacks lymphocytes directly.

The endocrine system sends messages using hormones. It delivers messages from the nervous system to the excretory system. It tells the excretory system when the blood is out of balance.

One gland causes calcium ions to be released; another gland causes them to be absorbed

Depends on when you consider it a child. First it's a Zygote, a fertilized egg, and then a blastocyst. Medically it's not a child until it's born. But if we start with embryo you can read all about it in the link below. Someone wrote blood starts pumping and arms starts to develop but that is weeks later.

Blood pumps through the body.

or

Rhythmic breathing movements

Experimental subjects are left free for manipulation

The molecule to which a drug binds.

A sperm or egg

eyes develop

lips start to form

Vocal cords develop.

An actual patient

In vitro (in glass)

It allows scientists to quickly make many copies of DNA

it makes the body create memory cells for future infections