Human Anatomy Physiology

Question Answer
Once gastrulation has been completed Organogenesis
The formation of body systems, begins. Its first event is the formation of a dorsal rodlike thickening of mesodern called the Nortochord
which appears immediatley deep to the former Primitive streak
and establishes the longitudinal axis of the embryo. This is quickly followed by the process called Neurulation
which leads to the formation of the nervous system this process begins as the Ectoderm
lying superior to the notochord is induced to thicken and then to fold and detach as the neural tube. this is quickly followed by the specialization of the Endoderm
Early differentiation of the mesoderm is forecast by its division into three regions Intermediate mesoderm Lateral plate mesodermsomites
The limb buds and parietal serosa are formed by the somatic mesoderm part of the lateral plate mesoderm
Where as the cardiovascular system form from the splanchnic layer. The gonads arise from the Intermediate mesoderm
Part of the blastocyst that forms the embryonic body Inner cell mass
Formed by the delamination of endodermal cells ventral sac Yolk sac
Site of respiratory exchange Placenta
Attaches the embryo placenta Allantois Umbilical cord
Finger like projections of the trophoblast that are invaded by extraebryonic mesodern Chorionic villi
After thre months the source of estrogen and progesteronne during pregnancy Placenta
The organ that delivers nutrients to and disposes of waste for the fetus Placenta
Projection abutting the yolk sac that serves as a depository for wastes in animals that form large yolked egs Allantois
Tissue eroded during implantation Endometrium
A fertilized egg Zgote
Swollen Ovum and sperm nuclei Pronuclei
Process during which a sperm becomes capable of undergoing the acrosomal reaction Capacitation
Release of digestive enzymes by sperm in the immediate vicinity of oocyte Acrosomal reaction
Term applied to the developing infant from fertlization to the end of the eight week after fertilization Embryo and conceptus
Fusion of the ovum and sperm nuclei Fertilization
Cells resulting from cleavage Blastomeres
The one sperm per oocyte condition Monospermy
Period of rapid mitotic cell division that results in cells with a high surface to volume ratio Cleavage
A consequence of syncytiotrophoblast activity during which endometrial cells are digested Implantation
Event that constitutes a block to polyspermy Cortical reaction
Term appliied to the developing infant after the eight week Fetus
Initiated by rising levels of ionic calcium within the oocyte cytoplasm Cortical reaction
Helps sperm locate an ovulated oocyte Olfactory receptors
Marked by exacerbations and remiissions Gental herpes
Its destructive tertiary lesions are called gummas Syphilis
Most common symptom in males is urthritis and penile drip may be asymptomatic in females Genital herpes
Not recognized as a health problem until the 19970's accounts for 25% to 50% of all pelvic inflammatory disease Chlamydia
Congeniital forms can cause severe fetalmalformations Genital herpes
Newborns of infected mothers may have conjuctivitis and respiratory tract infection Chlamydia
Like AIDS a viral rather than a bacterial disease. Genital Herpes
Only diagnosed by cell culture techniques treated with tetracycline Chlamydia
Disease rountinely treated with penicillin Syphilis
Typically caused by human papilloma virus diffrent strains linked to invasive cervical cancer Genital Herpes
Absense causes the spiral arteries of the endometrium to go into spasms and kink and the endometrium to slough off Estrogen Progesterone
Causes the endometrial glands to begin secreting nutrients Progesterone
The endometrium is repaired and grows thick and velvety Estrogen
Maintains the myometrium in an inactive state if implantation of an embryo has occured Progesterone
Stimulates gland formatiion in the endometrium Estrogen
Responsible for the secondary sex characteristics of females Estrogen
Causes the cervical mucus to become viscous Progesterone
Organ that delivers semen to female reproductive tract Penis
Site of sperm and testosterone production testes
Passageway for conveying sperm from the epididymis to the ejaculatory duct Ductus deferen
Conveys both sperm and urine down the length of the penis Urethra
Organs that contribute to the formation of semen bulborethral glands prostate seminal vesicle testes
External skin sac that houses the testes Scrotum
Tubular storage site for sperm hugs the lateral aspect of the testes Epididymis
Cuff of the skin encircling the glans penis Prepuce
Surrounds the urethra at the base of the bladder produces a milky slightly acid fluid Prostate
Produces over half of seminal fluid Seminal vesicles
Empties a lubricating mucus into urethra Bulborethral glands
Conective tissue sheath enclosing the ductus deferens blood vessels and nerves Spermatic cord

Leave a Reply

Your email address will not be published. Required fields are marked *