PRESENTATION 10THE REPRODUCTIVESYSTEMBy Sam Choi
The organ in which the developingfetus resides is the uterus Uterus (“womb” in latin) is located in the pelvis and it’s anterior to the rectum and posterosuperior to the bladder.
The uterus It is a hollow muscular organ that houses a fertilized ovum. The main part of the uterus is called body, then there is the cervix, which is a narrow area at the bottom part of the uterus and two isthmus lead into the fallopian tubes.
The uterus It is made up of three layers called perimetrium, myometrium and endometrium. Perimetrium is mainly peritoneum, Myometrium is composed of smooth muscle and endometrium is highly vascularized simple columnar epithelium.
The inner lining of the uterus iscalled endometrium Endometrium is highly vascularized simple columnar epithelium After fertilization, the embryo implants into the endometrium and stays there until it is developed.
Endometrium It has two layers, the The second layer, first most superficial stratum basalis, one is called the forms a new stratum functionalis functionalis after and it changes in menstruation is response to the completed. hormones levels and sheds during menstruation.
The time required for thedevelopment of the fetus is calledgestation Gestation in humans is 40 weeks. During this time, the fetus, located in the uterus will grow and develop until it is ready to come out.
Gestation Week 8: ossification Weeks 13-16: Face starts, looks human, GI cardiovascular tract is forming, system fully most bones are functional, limbs distinct. present. Weeks 17-20: Fetal Weeks 9-12: skins position is assumed, start developing, and mom feels fetal blood cells form in movement. the bone marrow, sex can be determined form the genitals.
Gestation Weeks 21-30: Substantial increase in weight, eyes are open, fingernails and toenails are present, distal limbs start to ossify, testes reach scrotum in males. Weeks 30-40: Skin becomes whitish pink, fat appears in the hypodermis. Labor and delivery will occur at the end of this period.
Works cited Fregmen, Bonnie. Medical Terminology. Pearson. Upper Saddle River, NJ. 2009. Marieb, Elaine. Human anatomy and physiology 7th ed. Pearson. San Fransisco, CA. 2007.