Anatomy Part 2 Flashcards
What is the function of the urinary system?
To produce urine and eliminate it from the body
What are the organs of the urinary system?
2 kidneys
2 ureters
1 bladder
1 urethra
What is the name of the tube leading urine out of the body?
Urethra
What anchours these organs to surrounding structures and helps maintain normal position?
Connective tissue
What artery brings blood to the kidneys?
Renal artery
Reabsorption reoccurs where in the nephron?
Tubules
- Move water, electrolytes, all nutrients from tubules back into blood
Where is the kidneys work actually done?
In the nephrons
3 main parts of nephrons:
- Glomerulus
- Tubule
- Bowman’s capsule
Filtration occurs in what part of the nephron?
glomerulus
Functions of kidneys:
- To produce and secrete urine
- Fluid and electrolyte balance
- Acid base balance (proper pH)
What is the most important nitrogenous waste that exits the kidney from protein metabolism?
Urea
What happens in kidney failure?
Electrolytes aren’t held to their normal concentrations.
What 3 processes does kidneys go through to form urine? What substances are involved?
Filtration (water, electrolytes, and nutrients)
Reabsorption (water and electrolytes, normally all nutrients)
Secretion (potassium and hydrogen)
What regulates the volume of urine produced?
Changes in the amount reabsorbed from the distal and collecting tubules
ADH, is produced by what?
Anti-diuretic hormone
- Produced in posterior pituitary
- The amount of H2O reabsorbed is determined by ADH and aldosterone
What is the name of the clump of capillaries?
Glomerulus
What is the name of the tube/ passageway leading from the kidneys to the bladder?
Ureters
What is the most common disorder that happens within the kidney?
Kidney stones known as renal calculi
What happens as urine is secreted?
It drops out of collecting tubules into the ureters and down to the bladder
What forces urine down to the ureters and into the bladder?
Waves of involuntary muscle contraction
What forms the wall of the bladder?
Smooth muscle fibres
How many opening are in the floor of the bladder?
3
- two form ureter
- one into urethra
- one urethra hole
Functions of the bladder:
- Reservoir for urine before it leave the body
2. Aided by urethra, expels urine from the body
T/F the female urethra is longer than the males
False, the female urethra is 1- 1/2 inches while the males is approx. 8 inches
The male urethra has two passageways, what are they for?
Semen
Urine
Urine components/substances:
Nitrogenous wastes Electrolytes Toxins Pigments Hormones Various abnormal constituents
T/F urine is approximately 95% water
True
Respiratory system (excretory organ, substance excreted)
Excretory organ: lungs
Substance excreted: carbon dioxide, water
Digestive system (excretory organ, substance excreted)
Excretory organ: large intestine
Substance excreted: wastes from digestion, some metabolic wastes
Name 5 functions of the respiratory system and explain:
- Gas exchanger
- Oxygen breathed in, carbon dioxide breathed out - Filters
- Cleanses, warms, and humidifies air we breathe - Influences speech
- Sound production - Assists in control of body’s acid base balance
- Lower carbon dioxide - alkaline
- Higher carbon dioxide - acidic - Makes sense of smell possible
- Olfactory receptors in
Nasal mucosa
The respiratory system consists of 3 general parts.
Upper respiratory tract
Lower respiratory tract
Accessory structures
What are the parts of the upper respiratory tract?
Nose
Pharynx
Sinuses
Larynx
What are the parts of the lower respiratory tract?
Trachea
Bonchial tree
Lungs
What are the accessory structures of the respiratory tract?
Oral cavity - mouth
Rib cage
Diaphragm
Name the 3 parts of the pharynx:
Nasal pharynx
Oropharynx
Laryngeal pharynx
When air is filtered what happens to it?
- Filtered of impurities
- Warmed
- Moistened
Pharynx (throat) functions:
- hallway for respiratory & digestive tracts
- role in speech
- takes part in eating, breathing & talking
What is the function of the epiglottis?
- Located in the larynx (voice box)
- Protects airway against entrance of solids or liquids during swallowing
T/F muscles change vocal cord length, tension, & regulate shape of larynx intel to change voice.
True
What supplies musus to the nasal cavity?
Sinuses
Where is the larynx located?
Located between pharynx and trachea
Function of bronchi:
Distributes air to lungs interior
What organ has a ciliated membrane lining with hair like projections that traps foreign substances?
Trachea (windpipe)
What accomplishes the lungs vital function of gas exchange between air and blood?
Alveoli
What is the function of the lungs?
- Air distribution to the alveoli
- Gas exchanger - between blood and alveoli
Name the single layer for gas exchange:
Alveoli sacs
What is the region between the lungs?
Mediastinum
Each lung is covered by a continuous double sac known as the _____?
Pleura
What are the 3 functions of the digestive system?
- Mastication
- Absorption
- Elimination
Segments of the GI tract:
- mouth
- oropharynx
- esophagus
- stomach
- small intestine
- large intestine
What are the 2 ways food is altered?
Mechanically
Chemically
What provides the most absorption?
Jejunum
Name the parts of the small intestine:
- Duodenum
- Jejunum
- Ileum
Name the parts of the large intestine:
- Cecum
- Colon
- Rectum
What regulates flow into the bottom of the large intestine?
Ileocecal valve
Esophagus extend from the _____ to ____.
Pharynx to stomach
Function of liver:
- Secretes bile
- filters blood
- detoxifies (alcohol, marijuana, food)
How many salivary glands are there?
3 pairs
1) parotid gland
2) sublingual gland
3) submandibular gland
Which intestine is the main organ for reabsorption of water and elimination?
Large intestine
The pancreas acts as a dual function, for what?
Acts as an endocrine and exocrine gland
What is the largest organ and gland in the body?
The liver
Which intestine is the main organ of digestion and Absorption?
Small intestine
What is formed when gastric juices mix with food?
Chyme
What lines the small intestine?
Villi, surrounded by microvilli
What is the function of the large intestine?
Reabsorption of water and elimination of undigested waste
What is the function of the gallbladder?
Stores bile, then contracts and ejects it into the duodenum
What protein is necessary for life?
Enzymes
What makes the common bile duct?
Hepatic or cystic ducts
Sphincter muscles of stomach:
Cardiac sphincter
Pyloric sphincter
Accessory organs of digestion:
- Salivary glands
- Tongue
- Teeth
- Liver
- Gallbladder
- Pancreas
- Appendix
Where is the stomach located?
Just below the diaphragm
Mixture of food and saliva:
Bolus