While working with each slide in this unit, not only should you learn to recognize the organ but you should learn to relate the function of the organ to its tissues and structures. This page summarizes organ and tissue functions for the assigned slides. Use this summary page in conjunction with your Histology Supplement sheet in reviewing this unit.The organs included are
KIDNEY: filters waste from the blood, forming urine
glomerulus - ball of fenestrated capillaries from which blood plasma leaves the circulatory system (blood cells are too large to fit through the fenestrations) to be filtered by the glomerular capsule (Bowman's capsule) and convoluted tubules
glomerular capsule - double membrane cup which receives the glomerular filtrate; most of the filtrate moves on to the convoluted tubule
convoluted tubules - site of absorption of necessary substances, while wastes and excess molecules continue to the collecting ducts (this is a very complex process - see your Van De Graaff text for details)
collecting ducts -connect the distal convoluted tubules with a renal calyx
nephron - functional unit of the kidney consisting of the glomerulus, glomerular capsule, the convoluted tubules, and Henle's loop
renal corpuscle - glomerulus and glomerular capsule
URINARY BLADDER: -stores urine
transitional epithelium - expandable epithelium that stretches as the bladder fills
muscle layer - in this organ it is smooth muscle which stretches as the organ fills and then recoils as the organ is emptied
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OVARY: site of the development and release of oocytes and the production of estrogen and progesterone. The maturation of the oocyte and the secretion of estrogen and progesterone are controlled by FSH and LH.
primary or primordial follicles - original follicles which are present at birth and hold the future ova
Graafian follicle - mature, fluid filled follicle with secondary oocyte
primary and secondary oocyte - term used to indicate the stage of meiosis in which the future ovum exists
TESTIS: site of the development of spermatozoa and the production of testosterone. Spermatogenesis and testosterone production are controlled by FSH and LH (ICSH).
seminiferous tubule - site of spermatogenesis
interstitial cells - between the seminiferous tubules and are the site of testosterone production
UTERUS: site for the development of the fetus
endometrium - inner lining composed of stratum functionale and stratum basale
stratum functionale - innermost lining of the uterus. It increases in depth during the menstrual cycle in anticipation of the arrival of the developing embryo and separates from stratum basale during menstruation. It becomes a part of the placenta during pregnancy. Estrogen and progesterone control the growth of this lining.
stratum basale - regenerates the stratum functionale following menstruation
myometrium - smooth muscle layer necessary for partuition. Contraction of this muscle is controlled by oxytocin from the pituitary gland.
perimetrium - outer covering of the uterus
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This page was last updated in August, 1997.
All micrographs are the property of Sherri Wick. Students of Biology 2740 and 2840 are welcome to use this page in the study and review of lecture and lab materials in the Human Physiology and Anatomy courses.
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