Anatomy Practical Exam Flashcards
Alimentary Canal
Whole passage along which food passes through the body from mouth to anus
Accessory Organ
Organ that helps with digestion but is not part of the digestive tract
Peritoneal Cavity
Potential space between parietal peritoneum and visceral peritoneum
Gastroesophageal Sphincter
A ring of smooth muscle fibers connecting esophagus and stomach
Pyloric Sphincter
Band of smooth muscle at junction of pylorus and duodenum
Duodenum
First part of the small intestine immediately beyond the stomach
Jejunum
Middle part of small intestine
Ileum
Third portion of small intestine
Colon
Long, coiled tubelike organ that removes water from digested foods
Pancreas (Digestive)
Large gland behind the stomach that secretes digestive enzymes into the duodenum
Liver
Large lobed glandular organ in the abdomen of vertebrates
Mucosa
Mucous membrane
Submucosa
Layer of areolar tissue beneath mucosa
Muscularis Externa
Region of muscle adjacent to submucosa
Responsible for peristalsis
Serosa
Tissue of serous membrane
Acinar Cells
Cluster of cells that resemble a “berry”
Produce pancreatic enzymes
Pancreatic Islet
Clusters of cells scattered throughout the pancreas that produce insulin
Liver Lobule
Unit of the liver consisting of masses of liver cells
Digestive Enzyme
Enzyme that breaks down polymeric macromolecules into building blocks
Chemical Digestion
Digestion using enzymes
Emulsification
The breakdown of fat globules in duodenum into tiny droplets
Bile
Bitter alkaline fluid that aids in digestion
Salivary Amylase
Source: Salivary glands
Function: Begins starch digestion in the mouth
Pepsin
Source: Stomach
Convertion: Converted from pepsinogen by HCl
Function: Digests proteins to shorter peptide chains, which then pass to the small intestine to complete digestion
Trypsin
Source: Pancreas
Convertion: Converted from trypsinogen by enterokinase
Function: Digests proteins
Pancreatic Lipase
Source: Pancreas
Function: Digests fat
Brush Border Enzymes
Source: Small intestine
Function: Carry out some of the final stages of chemical digestion
Endocrine Organ
Glands of the endocrine system that secrete hormones directly into the blood
Hormone
Regulatory substance transported in tissue fluids to stimulate specific cells
Target Tissue
Tissue or organ that is affected by a hormone
Negative Feedback
Counteraction of an effect by its own influence
Hypothalamus
Region of the forebrain below the thalamus that coordinates autonomic nervous system and pituitary
Thyroid Gland
Ductless gland that regulates growth and development through metabolism
Parathyroid Glands
Produce parathyroid hormones
Usually have four
Pineal Gland
Conical mass of tissue behind the third ventricle of the brain secreting hormone-like substances
Thymus
Lymphoid organ that produces T Cells
Pancreas (Endocrine)
Secretes hormones such as insulin and glucagon to regulate blood sugar
Adrenal Cortex
Outer portion of the adrenal gland that produces steroid hormones to regulate carbohydrate and fat metabolism
Adrenal Medulla
Inner part of adrenal gland that secretes epinephrine and norepinephrine
Ovaries
Produce ova/eggs
Testes
Produce spermatozoa
Antidiuretic Hormone
Secreted from: Posterior Pituitary
Stimulus: Nerve impulses from the hypothalamus when water decreases
Target Tissue: Kidneys
Oxytocin
Secreted from: Posterior Pituitary
Stimulus: Nerve impulses from hypothalamus or cervix
Target Tissue: Uterus, mammary glands
Thyroid-Stimulating Hormone
Secreted from: Anterior Pituitary
Stimulus: TRH from the hypothalamus
Target Tissue: Thyroid
Adrenocorticotropic Hormone
Secreted from: Anterior Pituitary
Stimulus: CRH from hypothalamus
Target Tissue: Adrenal Cortex
Growth Hormone
Secreted from: Anterior Pituitary
Stimulus: GHRH from hypothalamus
Target Tissue: Liver, bone, cartilage, muscle, fat
Prolactin
Secreted from: Anterior Pituitary
Stimulus: PRH from hypothalamus
Target Tissue: Mammary glands, testes
Melatonin
Secreted from: Pineal Gland
Stimulus: Dark increases, light decreases
Target Tissue: Brain
Thyroxine and Triiodothyronine
T3 and T4
Secreted from: Thyroid
Stimulus: Increased metabolic rate
Target Tissue: Most tissues
Calcitonin
Secreted from: Thyroid
Stimulus: Hypercalcemia
Target Tissue: Bone
Thymosin and Thymopoietin
Secreted from: Thymus
Stimulus: Immune development
Target Tissue: Immune cells (T lymphocytes)
Parathyroid Hormone
Secreted from: Parathyroids
Stimulus: Hypocalcemia
Target Tissue: Bone, kidneys, small intestine
Cortisol
Secreted from: Adrenal Cortex
Stimulus: ACTH from anterior pituitary during stress
Target Tissue: Most tissues
Aldosterone
Secreted from: Adrenal Cortex
Stimulus: Decreased sodium, increased blood calcium, decreased blood volume/blood pressure
Target Tissue: Kidney
Epinephrine and Norepinephrine
Secreted from: Adrenal Medulla
Stimulus: Sympathetic impulses from the hypothalamus
Target Tissue: Most tissues
Insulin
Secreted from: Pancreatic Islets
Stimulus: Hyperglycemia
Target Tissue: Most tissues
Glucagon
Secreted from: Pancreatic Islets
Stimulus: Hypoglycemia
Target Tissue: Primarily liver
Testes
Organs that produce spermatozoa
Seminiferous Tubules
Specific location of meiosis in the testes
Epididymis
Highly convoluted duct behind the testes from where sperm passes to the vas deferens
Vas Deferens
Duct that conveys sperm from testicles to urethra
Spermatic Cord
Bundle of nerves, ducts, and blood vessels connecting testicles to the abdomen
Seminal Vesicle
Each of a pair of glands that open into the vas deferens near its junction and secretes components of semen
Prostate Gland
Gland surrounding the neck of the male bladder that releases prostatic fluid
Corpus Spongiosum
Mass of erectile tissue along the corpora cavernosa
Corpora Cavernosa
Mass of erectile tissue forming the penis
Ovarian Follicles
Fluid-filled structure where ovum develops before ovulation
Uterine Tube
Transport ovum from ovary to uterus
Uterus
Where offspring are conceived and gestate
Cervix
Necklike passage on the lower end of the uterus
Vagina
Muscular tube from external genitals to cervix
Vulva
Female external genitals
Mammary Glands
Milk-producing glands
Meiosis I
Cell division that produces reproductive cells
Meiosis II
Prophase II, Metaphase II, Anaphase II, Telophase II
Haploid
Single set of unpaired chromosomes
Spermatogenesis
Formation of sperm
Oogenesis
Formation of ovum
Prophase
Chromosomes become visible as paired chromatids and nuclear envelope disappears
Crossing over occurs
Metaphase
Chromosomes become attached to spindle fibers
Anaphase
Chromosomes move away from one another to opposite poles of the spindle
Telophase
Chromosomes move to opposite ends of the cell and two nuclei are formed