BIOL 2312 Lecture Notes - Lecture 42: Stratified Squamous Epithelium, Thoracic Cavity, Pericardium
Document Summary
Cell -> tissue -> organ -> organ system. Tissues are groups of cells of a single type and function: 3 fundamental embryonic tissues: Ectoderm (outer: 4 primary types of tissues. Organs and organ systems provide specialized functions: organ: body structure is composed of diff. types of tissue that forms a structural/functional unit, organ system: group of organs that work together to perform major activities of the body. Vertebrate body has 11 principal organ systems. Vertebrate general body system is tube within a tube : inner tube: digestive tract, skeleton supports outer tube (inner skeleton) Outermost layer of body is integumentary system (skin, feathers, hair, sweat glands, etc) Vertebrates have dorsal and ventral (frontal) cavities: dorsal: skull/vertebrates (back, ventral: larger, chest, abdominals, pelvic (front) Diaphragm separates ventral into thoracic cavity (anterior) and abdinopelvic cavity (posterior) Pericardial cavity surrounds heart, pleural cavities around lungs: coelom.
