Animal Structure And Function Flashcards
Animal Systems
- Digestive
- Respiratory
- Circulatory
- Immune
- Excretory
- Nervous
- Musculoskeletal
- Endocrine
- Reproductive
- Morphogenesis/Development
Intracellular Digestion
Digestion occurring within food vacuoles
Extracellular Digestion
Digestion occurring within a gastrovascular cavity
Gut Regions
- Mouth
- Esophagus
- Crop (Storage Organ in some species)
- Stomach
- Intestine
- Rectum
- Anus
Gut Regions Unique to Humans
- Small Intestine
- Large Intestine
- Accessory Organs
Oral Cavity
The mouth
Mastication/Mechanical Digestion
The chewing, softening, and breaking up of food
Salivary Glands
Produces saliva
Saliva
Is filled with the enzyme salivary amylase and is found in the mouth
Salivary Amylase
Enzyme that begins the chemical breakdown of starch into maltose
Bolus
A ball of chewed up food
Peristalsis
Wavelike motion that moves food through the esophagus
Gastric Juices
Contain digestive enzymes and hydrochloric acid (HCl)
Pepsin
Breaks down proteins into smaller peptides
Chyme
Partially digested food that enters the small intestine
Pyloric Sphincter
A passage that chyme takes to get into the small intestine
Pancreas
Secretes trypsin, chymotrypsin, pancreatic lipase, and pancreatic amylase into the small intestine
Trypsin and Chymotrypsin
Break down proteins into dipeptides
Pancreatic Lipase
Breaks down lipids into fatty acids and gylcerol
Pancreatic Amylase
Breaks down starch into disaccharides
Pancreatic Duct
The passage enzymes take to enter the small intestine
Bile
An emulsifier made in the liver and stored in the gall bladder
Emulsifier
A substance that mechanically breaks up fats into smaller fat droplets
Villi and Microvilli
Folds that increase the surface area of the small intestine and absorb food particles
Lacteals
Lymph vessels in the villi that absorb fatty acids
Gastrin
An enzyme that stimulates stomach cells to produce gastric juices
Secretin
An enzyme that stimulates the pancreas to produce bicarbonate and digestive enzymes
Cholecystokinin
An enzyme that stimulates the secretion of pancreatic enzymes and the release of bile
Vitamin K
An essential vitamin that is provided by bacteria during digestion
Feces
Leftover digested food that moves into the rectum and out the anus
Trachae
Tubes that allow for passage of air in certain organisms
Spiracles
Tubes that air enters into
Lungs and Gills
Respiratory structures in most vertebrates
Pharynx
The throat
Larynx
The voice box
Epiglottis
Covers the trachea and prevents food from going down the wrong pipe
Left Bronchus and Right Bronchus
Branches that service the lungs
Bronchiole
Smaller tubes found in throughout the lungs
Alveolus
Sacs at the end of each bronchiole that enable the lungs to have a high surface area for gas exchange
Capillary
Hold carbon dioxide and accept oxygen from the alveolus and then send carbon dioxide to the alveolus and branch off from arterioles
Hemoglobin
Transports 97% of the oxygen in your blood while the other 3% is dissolved in the plasma
Plasma
Fluid of the blood
Bicarbonate Ions (H2CO3)
Form when CO2 combines with water in red blood cells
Inspiration
Taking in oxygen by increasing the volume of your lungs, allowing air to rush in
Expiration
Letting carbon dioxide out of your lungs by breathing out
Chemoreceptors
Control an organism’s respiratory rate
Diaphragm
Muscle between ribs and lungs that contract to push rib cage outwards and allow air to enter the lungs
Open Circulatory System
Blood is carried by open ended blood vessels that spill blood into the body cavity
Sinuses
Internal cavities
Closed Circulatory System
Blood flows continuously through a network of blood vessels
Chambers of the Heart
- Right Atrium
- Right Ventricle
- Left Atrium
- Left Ventricle
Systemic Circulation
Blood leaves the left ventricle and tours the body before returning to the heart
Aortic Semilunar Valve
Passage that blood takes to leave the heart and into the aorta
Aorta
Largest artery in the body
Arterioles
Smaller vessels that branch off of arteries
Deoxygenated
When blood is depleted of oxygen
Venules
Passages that direct blood into the veins
Veins
Carry blood towards the heart
Superior Vena Cave and Inferior Vena Cava
Allow blood to enter the heart
Right Atrioventricular Valve (Tricuspid)
Allows blood to travel from the right atrium to the right ventricle
Pulmonary Circulation
Blood leaving the heart to go towards the lungs
Pulmonary Semilunar Valve
Passage that blood takes to leave the right ventricle
Pulmonary Artery
Blood enters this after leaving the right ventricle
Oxygenated
Blood is filled with blood within the lungs
Pulmonary Veins
Direct blood back towards the heart and the left atrium of the heart
Left Atrioventricular Valve (Bicuspid/Mitral Valve)
Passage that allows blood to enter the left ventricle of the heart
Thermoregulation
The maintenance of a fairly stable body temperature regardless of external conditions
Endotherms
Animals that regulate their internal temperature
Counter Current Exchange
Arteries leaving with warm blood help heat the cold blood heading back to the heart through the veins
Ectotherms
Animals that gain and lose heat based on their current environmental conditions
Sinoatrial (SA) Node
The tissue where the rhythmic beating of the heart begins
Atrioventricular (AV) Node
The impulse from the SA Node is carried to this node
Bundle of His and Purkinje Fibers
The action potential from the AV Node is carried to both of these and causes your heart to contract
Systole
The part of the beating cycle in which contraction occurs
Diastole
The part of the beating cycle in which relaxation occurs
Red Blood Cells (Erythrocytes)
Oxygen carrying cells within the body
White Blood Cells (Leukocytes)
Fight infection against foreign organisms
Platelets
Fragments that cause blood to clot
Bone Marrow
Where all blood cells are made and is found in the center of the bone
Blood Groups
- A
- B
- AB
- O
Antibodies
An immune substance that will bind and destroy foreign bodies
Rh Factors
Antigens found on blood cells (Rh+ has Rh Factors)
Lymphatic System
A network of vessels that conduct lymph throughout the body
Lymph
A clear, watery fluid formed from interstitial fluid
Lymph Node
A mass of tissue found along the course of a lymph vessel that contain lymphocytes
Lymphocytes
Multiply rapidly when they come into contact with an antigen or foreign substance and assist in fighting off infection
Antigen
Foreign substance recognized by the immune system
Immune System
A system of specialized cells that help fight off foreign organisms and prevent infection
Phagocytes
Engulf antigens
Complement Proteins
Lyse the cell wall of the antigen
Interferons
Inhibit viral replication and activate surrounding cells that have antiviral actions
Inflammatory Response
A series of events in response to antigen invasion or physical injury
Pathogen
A disease causing agent
Cell-Mediated Immunity
Immunity that comes from cells being able to recognize and destroy foreign bodies
Major Histocompatability Complex (MHC)
Markers that distinguish between self and foreign cells
Memory T and B Cells
Recognize pathogens they have encountered before and attack them
Helper T Cells
Activate B Cells and other T-Cells in response to infected cells
Cytotoxic T Cells
Recognize and kill infected cells
AIDS (Acquired Immunodeficiency Syndrome)
Interferes with the body’s immune system by destroying all helper T Cells
Nitrogenous Wastes
Wastes that contain nitrogen
Ammonia (NH3)
A harmful substance that is a byproduct of protein breakdown
Uric Acid and Urea
Animals convert ammonia to these substances to easily get rid of them from their bodies
Nephridia
Excretory organ found within earthworms
Malpighian Tubes
Excretory organ found in arthropods
Kidney
Organ that regulates excretion
Nephrons
The functional units that make up the kidney
Regions of a Nephron
- Bowman’s Capsule
- Proximal Convoluted Tubule
- Loop of Henle
- Distal Convoluted Tubule
- Collecting Duct
Renal Cortex
Outer section of the kidney that contains the Bowman’s Capsule and the Proximal Convoluted Tubules
Renal Medulla
Inner section of the kidney that contains the Loop of Henle and Distal Convoluted Tubules