chapter 40—animal structure & function
TRANSCRIPT
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Chapter 40—Animal Structure
& Function
What do you have in common with
a 75 watt light bulb?
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I. Functional Anatomy • Hierarchy of Animal Systems:
– Cells → Tissues → Organs → Organ Systems →
Organisms
• 4 Types of Tissues…
– epithelial, connective, nervous, & muscle
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Epithelial Tissue Types
• Sheets of tightly packed cells
Functions:
• Cover outside of body
• Line organs & internal cavities
• Absorb/secrete chemical solutions
Simple vs. Stratified vs.
Pseudostratified?
Squamous vs. Cuboidal vs.
Columnar?
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Epithelial Tissue Types
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Connective Tissue Types
• Sparse cells scattered
through an extracellular
matrix (liquid, jelly-like, or
solid)
Functions:
• Bind & support other
tissues
• Packing material,
insulation, cushion,
connectors, transport
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Connective Tissue Types
• Bone
• Blood
• Adipose
• Cartilage
• Loose
Connective
Tissue*
• Fibrous
Connective Tissue
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Muscle Tissue Types
• Long cells capable of contracting
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Muscle Tissue Types
• Skeletal (voluntary)
• Cardiac (involuntary)
• Smooth (involuntary)
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Nervous Tissue
• Sense stimuli, transmit signals,
coordinate functions
• Functional unit = neuron (nerve cell)
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II. Regulating the Internal Environment
Homeostasis:
• 37 °C (temp)
• pH = 7.4 (blood)
• 0.1% sugar (blood)
Feedback Mechanisms:
• Negative feedback (reverses change)
• Positive feedback (amplifies change)
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III. Animal Bioenergetics
Animals are heterotrophic—harvest
energy from food
• cellular respiration of food provides ATP
for cellular work and biosynthesis
(storage, growth, reproduction)
• remaining food is also used for
biosynthesis
(Figure 40.10)
Bioenergetic Strategies:
• Endothermic (birds, mammals)
• Ectothermic (fishes, amphibians,
reptiles, invertebrates)
BMR vs. SMR?
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Energy Budgets