Biological Building Blocks of Life
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Transcript of Biological Building Blocks of Life
Biological Building Blocks of LifeCell Diversity
Tissue DiversityClassification of Body Membranes
Biological Building Blocks of LifeCell Diversity
Tissue DiversityClassification of Body Membranes
Cell Diversity
• An average human body are made up of 200+ different cell types
• These vary greatly in size, shape and function
• All are derived from one single cell type: stem cell
For simplicity, we will categorize these cells base on their functions
Anatomy: The study of the parts (eg. cells, tissues, organs, systems) of an organism
Physiology: The study of the functions of the parts of an organism
Cells that …
fibroblasts erythrocytes
a) connect body part
b) cover and line body organs
epithelial cells
c) move organs and body parts
muscle cells
d) store nutrients
fat cells
f) gather info & control body functions
nerve cells
e) fight disease
macrophage
g) involve in reproduction
sperm
General Cell Shapes
Cell combinations
Esophagus lining Bladder lining
Tissue Diversity• Tissues are made up of ________ ________
• There are four (4) different types of tissue
muscleepithelia nervous
connective
bone loose connective bloodcartilage
Classification of Epithelial Membrane• Epithelial membrane is a covering organ for many organs
• There are four (4) different types of epithelial membrane we will only discuss two (2) of them
Cutaneous membrane (skin) Mucous membrane
Cutaneous Membrane
• Protect us from: germs and cold drying out of body’s vital fluid mechanical injuries of our soft tissues
• Regulate body’s temperature : evaporate perspiration contract or relax the superficial blood vessels
• Act as organ of sense: it has nerve endings
• Act as biological gate: it can absorb and eliminate certain substances
• Has the fastest renewal rate!
Mucous Membrane
• covers body cavities that open to the outside
• epithelia consist of: stratified squamous simple columnar cells
• is wet because of continuous exposure to secretions
• not all mucosae secrete mucus (eg. cells that line the urinary tract)