Tuesday, April 19, 2011
Questions or Comments ???
Please provide any questions or comments on the blog and any of the presented items. If you want a quick response, please email me at miguelv_ignacio@yahoo.com, THANK YOU!!!
The Reproductive System
The male reproductive system delivers sperm and sperm are produced in the testes and stored in the epididymis and ductus deferens.
The female reproductive system produces eggs and supports pregnancy. The ovaries produce mature oocytes and release them one at a time on a cyclic basis.
Fertilization takes place in the oviduct and the fertilized egg makes its way into the uterus where it implants and begins to develop into a fetus.
Menstrual cycles consists of ovarian and uterine cycles.
The female reproductive system produces eggs and supports pregnancy. The ovaries produce mature oocytes and release them one at a time on a cyclic basis.
Fertilization takes place in the oviduct and the fertilized egg makes its way into the uterus where it implants and begins to develop into a fetus.
Menstrual cycles consists of ovarian and uterine cycles.
Reference:
Johnson, M. D. (2010). Human Biology: Concepts and Current Issues (5th ed.). San Francisco: Pearson Education.
The Urinary System
The urinary system contributes to homeostasis and the kidneys are the primary regulators or water balance and most excess solutes , especially inorganic ions and urea.
The system consists of organs that produce, transport, store, and excrete urine.
Nephrons in the kidneys produce urine and each nephron consists of tubular components and blood vessels that supply.
The tubular components of a nephron are the glomerular capsule, proximal tube, loop of Henle, distal tube, and collecting duct.
The formation of urine involve three processes which are glomerular filtration, tubular reabsorption, and tubular secretion.
The system consists of organs that produce, transport, store, and excrete urine.
Nephrons in the kidneys produce urine and each nephron consists of tubular components and blood vessels that supply.
The tubular components of a nephron are the glomerular capsule, proximal tube, loop of Henle, distal tube, and collecting duct.
The formation of urine involve three processes which are glomerular filtration, tubular reabsorption, and tubular secretion.
Reference:
Johnson, M. D. (2010). Human Biology: Concepts and Current Issues (5th ed.). San Francisco: Pearson Education.
The Digestive System
The digestive system brings nutrients into the body. The five basic processes of digestion are motility, secretion, digestion, absorption, and excretion.
The mouth processes food for swallowing. The 32 teeth cut, tear, grind, and crush food.
The pharynx and esophagus deliver food to the stomach.
The stomach stores food, digests protein, and regulates delivery.
Accessory organs aid in digestion and absorption. The pancreas secrete digestive enzymes into the small intestine, the liver produces bile, and the gallbladder store bile from the liver.
The large intestine absorbs nutrients and eliminates wastes . Defecation can be overridden by conscious control and the waste particles exit by way of the rectum and anus.
Reference:
Johnson, M. D. (2010). Human Biology: Concepts and Current Issues (5th ed.). San Francisco: Pearson Education.
The mouth processes food for swallowing. The 32 teeth cut, tear, grind, and crush food.
The pharynx and esophagus deliver food to the stomach.
The stomach stores food, digests protein, and regulates delivery.
Accessory organs aid in digestion and absorption. The pancreas secrete digestive enzymes into the small intestine, the liver produces bile, and the gallbladder store bile from the liver.
The large intestine absorbs nutrients and eliminates wastes . Defecation can be overridden by conscious control and the waste particles exit by way of the rectum and anus.
Reference:
Johnson, M. D. (2010). Human Biology: Concepts and Current Issues (5th ed.). San Francisco: Pearson Education.
The Endocrine System
The endocrine system produces hormones and hormones are chemical messengers that circulate in the blood and act on specific target cells.
Hormones are classified as steroid or non steroid, steroid hormones enter the target cell in order to function while non steroid hormones bind to receptor on the outer surface of the cell membrane.
The hypothalamus and the pituitary gland link the nervous and endocrine systems.
The pancreas secretes glucagon (which raises the blood sugar), insulin (which lower glucose level), and somatostatin (which inhibit the secretion of glucagon and insulin.
The adrenal glands comprise the cortex and the medulla.
The thyroid gland produces thyroxine, triiodothyronine, and calcitonin while the parathyroid produces PTH which along with calcitonin is responsible for the regulation of blood calcium concentration.
The testes produce the male sex hormone testosterone while the ovaries produce the two female sex hormones estrogen and progesterone.
Hormones are classified as steroid or non steroid, steroid hormones enter the target cell in order to function while non steroid hormones bind to receptor on the outer surface of the cell membrane.
The hypothalamus and the pituitary gland link the nervous and endocrine systems.
The pancreas secretes glucagon (which raises the blood sugar), insulin (which lower glucose level), and somatostatin (which inhibit the secretion of glucagon and insulin.
The adrenal glands comprise the cortex and the medulla.
The thyroid gland produces thyroxine, triiodothyronine, and calcitonin while the parathyroid produces PTH which along with calcitonin is responsible for the regulation of blood calcium concentration.
The testes produce the male sex hormone testosterone while the ovaries produce the two female sex hormones estrogen and progesterone.
Reference:
Johnson, M. D. (2010). Human Biology: Concepts and Current Issues (5th ed.). San Francisco: Pearson Education.
Out of Topic (Break...)
Any questions or concerns regarding this blog or any of the presented material, please go to the comments section and write a small note and I will get back at you, Thank you!
In the mean time, I wanted to share this as a little something I like to do once in awhile each year...Oh and I finally found out the way to put youtube videos here, YAY!
This is called airsoft - it is a military simulation action game with replica guns used and shooting small plastic round bbs.
Monday, April 18, 2011
The Nervous System
The nervous system receives, processes, and stores information and the central nervous system provides sensory information and the peripheral nervous system system provides sensory input and motor output.
The peripheral nervous system (PNS) has somatic and autonomic division while the autonomic division of the PNS has sympathetic and parasympathetic divisions.
Neurons are the communication cells of the nervous system and these generally consists of a cell body, several short extensions called dendrites, and long thin extensions called an axon.
The brain and spinal cord constitute the central nervous system and they are protected by bone, by three layers of connective tissues called meninges and by cerebral spinal fluid.
Reference:
Johnson, M. D. (2010). Human Biology: Concepts and Current Issues (5th ed.). San Francisco: Pearson Education.
The peripheral nervous system (PNS) has somatic and autonomic division while the autonomic division of the PNS has sympathetic and parasympathetic divisions.
Neurons are the communication cells of the nervous system and these generally consists of a cell body, several short extensions called dendrites, and long thin extensions called an axon.
The brain and spinal cord constitute the central nervous system and they are protected by bone, by three layers of connective tissues called meninges and by cerebral spinal fluid.
Reference:
Johnson, M. D. (2010). Human Biology: Concepts and Current Issues (5th ed.). San Francisco: Pearson Education.
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