Class Notes (836,219)
United States (324,396)
Biology (36)
BIO 1030 (23)
Lecture 40

BIO 1030 Lecture 40: BIO 1030 Lecture 40
Premium

7 Pages
57 Views
Unlock Document

Department
Biology
Course
BIO 1030
Professor
Dr.Robert Thomas
Semester
Winter

Description
BIO 1030 Lecture 40 Notes  The body’s organization o Cell o Tissue  Group of similar cells performing a similar function o Organ  Contain different types of tissues each performing to aid in the overall action of the organ o Organ system o Organism  4 major tissue types o Epithelial tissue  Covers the body surfaces and lines body cavities o Connective tissue  Binds and supports body parts o Muscle tissue  Moves the body and its parts o Nervous tissue  receives stimuli and conducts nerve impulses  Epithelial tissue protects o Also called epithelium o Forms external and internal linings of many organs o Covers surface of body o Adhere to one another but are generally only one cell layer o Protective function  Substances have to physically pass through epithelial cells to enter body o Differentiated by shape  Squamous – flattened cells  Cuboidal - cube-shaped cells  Columnar – rectangular pillar or columns (allow the movement of material) o One or more epithelial cells are the primary components of glands (produce and secrete products)  Epidermis o Outer region of skin o Stratified (layered) o Cell reinforced with keratin for strength and waterproofing o Protection from injury, drying out, and pathogen  Epithelial tissue constantly replaces its cells o Useful in harsh environments like skin or digestive tract o Also more likely to become cancerous  Connective tissue connect and protects o All types involved in binding organs together and providing support and protects o Connective tissue cells widely separated by matrix – noncellular material that varies from solid to liquid o Matrix usually has fibers – notably collagen  Dense fibrous connective tissue o More collagen fibers packed closer together than loose fibrous connective tissue o More specific function – found in tendons (connects muscle to bone) and ligaments (connects bones to bones at joints)  Cartilage and Bone (connective tissue) o Cartilage – cells lie in lacunae separated by solid yet flexible matrix o Bone – most rigid connective tissue  Hard matrix of inorganic salts (calcium) deposited around collagen fibers  Rigidity with elasticity and strength  Most common type is compact bone  Blood o Composed of several types of cells suspended in liquid matrix (plasma) o Blood unlike other connective tissue in that matrix (plasma) is not made by cells o Transports nutrients and oxygen to cells o Removes waste o Helps distribute heat o Plays role in fluid, ion, and pH balance o Components help fight disease and clot blood o Red blood cells transport oxygen o White blood cells fight infection o Platelets, cell fragments, form a plug and release molecules to help clotting process  Muscular tissue moves the body o Works with nervous tissue to enable movement o Contains contractile proteins actin and myosin o 3 types of vertebrae muscles  Skeletal  Voluntary  Attached to skeleton  Striated, tubular form  Cardiac  Involuntary  Striated, branched fibers  Occurs in walls of heart  Smooth  Involuntary  Spindle-shaped, nostriated, uninucleated fibers  Occurs in walls of internal organs  Nervous tissue communicates o Coordinates body parts and allows animal to respond to external and internal
More Less

Related notes for BIO 1030

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit