Each B-lymphocyte cell is responsible for creating one specific antibody. If the B-lymphocyte's antibody matches to the right antigen, the lymphocyte will differentiate into a plasma cell. Plasma cells release free antibodies into the bloodstream. The transition process from B-cell to plasma cell is mediated by helper T-cells.

Adaptive immunity involves immune cells created due to previously experiencing an infection by a particular pathogen. T-cell lymphocytes mature in the thymus, and recognize a specific antigen. T-cells and B-cells work to produce antibodies against a specific antigen, making them highly specific. This specification is only found in the adaptive immune system

In contrast, the innate immune system can respond to any pathogen, regardless of previous exposure, Neutrophils, monocytes, and macrophages are all part of the innate immune response and help with phagocytosis and inflammation.

Memory B-cells are long-lived descendents of B-cells that "remember" their encounter with an antigen and can rapidly respond to reexposure to the same antigen. Helper T-cells stimulate the immune responses by B-cells and cytotoxic T-cells. B-cells produce antibodies. Macrophages destroy invading microbes via phagocytosis and alert other immune cells to the invasion. Effector molecules include histamine and the cell-destroying proteins of cytotoxic T-cells. 

In response to infection, white blood cells multiply so that they can make antibodies against whatever it is your body is fighting off.

B-lymphocytes are the immune system's "memory"—once the body is attacked by a certain virus or bacteria, the body produces B-lymphocytes that can specifically recognize that disease. When the B-lymphocyte comes in contact with the disease (recognized by antibodies) it signals killer T-cells and helper T-cells to attack, and creates more antibodies to signal additional T-cells.

Natural killer cells destroy any cells of the human body that have become infected by an attacker. 

Macrophages are a general clean-up cell that sweep up debris, old cells, and sometimes attackers via phagocytosis.

Killer and helper T-cells are both activated by B-lymphocytes

B cells make antibodies that are specific to antigens. Antibodies bind to antigens to tag them for destruction. Cytotoxic T cells recognize and bind antigens and destroy them immediately. Helper T cells recognize antigens presented by antigen-presenting cells such as dendridic cells, and bring them to the attention of B cells, stimulating the B cells to begin making lots of antibodies.

The epididymis is responsible for storing sperm in order for it to mature. Upon ejaculation, it will be propelled into the vas deferens and out of the urethral opening. 

Eggs, or oocytes, are produced in the ovaries. During ovulation, the egg is released from the ovary into the fallopian tube. If fertilized, the egg transitions into a zygote and is implanted into the uterus for gestation and development.

The spleen is involved in filtering the blood and lymph, and is not involved in reproduction.

The ovaries release eggs into the fallopian tubes, which carry the egg to the uterus.

Fimbriae are protrusions from the fallopian tube that receive the egg from the ovary before transferring it to the fallopian tube itself. The uterus houses the endometrium and, if fertilization occurs, the developing embryo. The cervix is the structure that separates the uterus from the vaginal canal.

An ectopic pregnancy occurs when the egg gets implanted into the fallopian tube rather than the uterus. This is painful, and leads to surgical procedures in order to protect the mother.

The uterus is a muscular organ in the pelvic cavity. It is also called the womb. The uterus is divided into three regions: the upper region (the fundus), the midportion (the body), and the cervix. The ovaries are almond-shaped organs located in the pelvic cavity. The fallopian tubes connects the ovaries and the uterus. A fallopian tube is divided into three sections: the infundibulum, the ampulla, and isthmus. The vagina, or birth canal, is a muscular tube connecting the cervix to the vulva. The epididymis is a twisted tube that is located on and beside a testis.