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Animal Organization and Homeostasis. 15.1 Types of tissues. What is tissue?. Two or more cells of the same type performing a common function Four types of tissue Epithelial Connective Muscular Nervous. What is epithelial tissue?. Characteristics Cell rich Avascular
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Animal Organization and Homeostasis 15.1 Types of tissues
What is tissue? • Two or more cells of the same type performing a common function • Four types of tissue • Epithelial • Connective • Muscular • Nervous
What is epithelial tissue? • Characteristics • Cell rich • Avascular • Basal vs. apical side (polarity) • Basement membrane • Cell shapes • Squamous • Columnar • cuboidal
What types of epithelium are there? • Types • Simple • Stratified • Glandular • Exocrine • Endocrine
What is connective tissue? • Characteristics • Cell poor • Matrix rich • Collagen • Elastin • Reticular fibers • Vascular (with exceptions) • Cyte vs. blast
What are the types of connective tissue? • Adipose • Loose CT • Fibro- • Dense CT • Fibro- • Cartilage • Lacunae • Chondro- • Bone • Osteo- • Blood • Erythrocytes • Leukocytes • Platelets
What is muscular tissue? • Responds to stimulus • Contracts • Myo- • Three types • Skeletal (voluntary) • Cardiac (involuntary) • Smooth (involuntary)
What is nervous tissue? • Also responds to stimulus • Sends signals • Two types of cells • Neuroglia • Neurons
Animal Organization and Homeostasis 15.2 Body cavities and homeostasis
What are body cavities? • Regions of body • Two cavities • Dorsal • Brain • Spinal cord • Ventral • Thoracic • Abdominal • Pelvic
What are the organ systems of the body? • Integumentary • Skeletal • Muscular • Nervous • Endocrine • Cardiovascular • Immune • Urinary • Digestive • Respiratory • Reproductive
What is homeostasis? • Body’s tendency to maintain internal set points • Negative feedback • Most common • Solution state is opposite of problem state
What is a positive feedback loop? • Positive feedback • Rare • Solution state heightens problem state • Child birth • Fever • Blood clotting
Animal Organization and Homeostasis 15.3 Anatomical position and terms
What are some anatomical terms for position/location? • Anatomical position: left is right and right is left! • Position descriptions • Supine, prone
Medial, lateral medial Lateral
Proximal, distal proximal distal comparison
What are the anatomical planes? • Sagittal • Midsagittal • Parasagittal
What are the anatomical planes? • Frontal
What are the anatomical planes? • Transverse
What are the body cavities? • Dorsal body cavity • Cranial cavity: cranium and stuff inside • Vertebral cavity: vertebral column and stuff inside
What are the body cavities? • Ventral body cavity • Diaphragm divides thoracic and abdominopelvic cavities • Thoracic: mediastinum divides left from right
What kinds of membranes line cavities? • Meninges: lines brain and spinal cord
What kinds of membranes line cavities? • Serous membrane: no outside opening • Inner: visceral layer • Outer: parietal layer • In between: cavity filled with serous fluid • Thoracic: pleurae and pericardium • Abdominopelvic: peritoneum
What kinds of membranes line cavities? • Mucous membrane: outside opening • Examples?