Introduction Flashcards
II) Multicellular Organisms (parts)
A. Organization
B. Advantages
C. Disadvantages
II) Multicellular Organisms (definition)
- permits specialization of cells
- allows differential functions
Multicellular Organisms:
A. Organization
- Tissue
- Organs
- Organ Systems
Tissues
Cells of same type
Ex: cardiac muscle
Organs
Tissues producing joint function
Ex: heart
Organ Systems
Groups of organs with shared responsibility
Ex: cardiovascular system
Multicellular Organisms:
B. Advantages
- Increased efficiency
- Controlled shape
- Large size
Increased efficiency
Specialized function
Controlled shape
- optimizes 3D structure
- specific functions
ex: support internal transport, defense
Large size
N/a
Multicellular Organisms:
C. Disadvantages (definition)
-effects of scale Mass ⬆️ as function r^3 Surface area ⬆️ as a function r^2 As size (r) ⬆️, surface / volume ratio ⬇️
Multicellular Organisms:
C. Disadvantages (parts)
- First problem: transport requirements
2. Second problem : physical support
Transport requirements
- Access to nutrients
- Removal of wastes
- Regulation of heat
Figure: internal exchange surfaces of complex animals
Physical support
Supporting the weight
Ex: profile of deer vs elephant
III) Animal Structure (parts)
A. Tissue Types (4)
B. Organs
C. Homeostasis
III) Animal Structure
A. Tissue Types (4)
- Epithelial tissue
- Connective tissue
- Muscle tissue
- Nervous tissue
Epithelial Tissue
- sheets lining the outer & inner surfaces
- protective barrier (diffusion filter)
- multiple types (squamous, columnar, cuboidal)
Connective Tissue
- provides structural support
- generally cells embedded in extracellular matrix (e.g. cartilage, bone, adipose tissue, blood cells & plasma)
Muscle Tissue
- skeletal muscle: generates movement
- smooth muscle: in internal organs, involuntary control
- cardiac muscle: heart, pump blood
Skeletal Muscle
generates movement
Smooth Muscle
internal organs, involuntary control
Cardiac Muscle
heart, pump blood
Nervous Tissue
-process information
III) Animal Structure
B. Organs
- multiple tissues with joint functioning
(e. g. stomach has all 4 tissue types)
III) Animal Structure
C. Homeostasis
- organ systems to maintain homeostasis in internal environment
- consult table 32.1!
Table 32.1 Principle Organ Systems in Mammals
Organ Systems
Digestive Circulatory Respiratory Immune and lymphatic Excretory Endocrine Reproductive Nervous Integumentary Skeletal Muscular
Organ System: Digestive
Main Components?
Mouth, pharynx, esophagus, stomach, intestines, liver, pancreas, anus
Organ System: Digestive
Main Functions?
Food Processing (ingestion, digestion, absorption, elimination)
Organ System: Circulatory
Main Components?
heart, blood vessels, blood
Organ System: Circulatory
Main Functions?
Internal distribution of materials
Organ System: Respiratory
Main Components?
lungs, trachea, other breathing tubes
Organ System: Respiratory
Main Functions?
gas exchange (uptake of oxygen; disposal of carbon dioxide)
Organ System: Immune & lymphatic
Main Components?
bone marrow, lymph nodes, thymus, spleen, lymph vessels, white blood cells
Organ System: Immune & lymphatic
Main Functions?
body defense (fighting infections and cancer)
Organ System: Excretory
Main Components?
kidneys, ureters, urinary bladder, urethra
Organ System: Excretory
Main Functions?
disposal of metabolic wastes; regulation of osmotic balance of blood
Organ System: Endocrine
Main Components?
pituitary, thyroid, pancreas, adrenal, and other hormone-secreting glands
Organ System: Endocrine
Main Functions?
Coordination of bod activities (such as digestion and metabolism)
Organ System: Reproductive
Main Components?
ovaries or testes and associated organs
Organ System: Reproductive
Main Functions?
reproduction
Organ System: Nervous
Main Components?
brain, spinal cord, nerves, sensory organs
Organ System: Nervous
Main Functions?
coordination of body activities; detection of stimuli and formulation of responses to them
Organ Systems: Integumentary
Main Components?
skin and its derivatives (such as hair, claws, skin glads)
Organ Systems: Integumentary
Main Functions?
protection against mechanical injury, infection, dehydration; thermoregulation
Organ Systems: Skeletal
Main Components?
skeleton (bones, tendons, ligaments, cartilage)
Organ Systems: Skeletal
Main Functions?
body support, protection of internal organs, movement
Organ Systems: Muscular
Main Components?
skeletal muscles
Organ Systems: Skeletal
Main Functions?
locomotion and other movement