howMed Know Yourself
The reproductive system of the male has two major functions: Production of sperm Delivery of these to the reproductive tract … Read More »
Oogenesis and Ovarian Cycle
PRIMORDIAL GERM CELLS Gametes are derived from PGCs. Formed in the epiblast during 2nd week and move to the wall … Read More »
Chromosomal Abnormalities
Causes of birth defects and spontaneous abortions are two fold: 1. Chromosomal abnormalities 2. Genetic factors Incidence For Major Chromosomal … Read More »
Mitosis and Meiosis
CHROMOSOMES Are structures composed of condensed DNA and associated proteins When DNA condenses, the molecule becomes wrapped around proteins called … Read More »
Case of Lesion in the Brain Stem
A 64 year old professor complains of weakness in his right arm and leg[1] and double vision[2]. He also said … Read More »
Uterus and Uterine Tube
Uterus: Points of Identification: 1.Three layers; mucosa, fibromuscular layer and serosa. 2. Endometrium has simple columnar epithelium. 3. Mucosa invaginated … Read More »
Epididymis, Vas Deferens, Prostate and Seminal Vesicle
Epidydmis: Points of Identification: 1. Pseudostratified columnar epithelium is present. 2. Cilia and microvilli present. 3. Connective tissue and smooth … Read More »
Testis
Points of Identification: 1. Seminiferous tubules are present. 2. Germ cells are surrounded by sertoli cells. 3. Cells of Leydig … Read More »
Ureter and Urinary Bladder
Ureter: Points of Identification: 1. Typically a star shaped lumen present. 2. Three layers can be seen; mucosa, muscularis and … Read More »
Kidney Histology
Points of Identification: 1. Nephron is the functional unit. 2. The cortex consists of convoluted tubules together with the renal … Read More »