Class Notes (836,216)
Canada (509,690)
York University (35,302)
KINE 2031 (127)
Neil Smith (92)
Lecture

Anatomy 2031 Tissues

11 Pages
95 Views
Unlock Document

Department
Kinesiology & Health Science
Course
KINE 2031
Professor
Neil Smith
Semester
Fall

Description
Tissues – four kinds of tissues: epithelial, nervous, connective, and muscular. - Tissues are groups of similar cells that perform together to serve a specialized function. Figure 1. Different types of tissues Function of epithelial tissue: 1. Physical protection/barrier eg. Skin @ outer layer a. Acts as selective barrier between environment and internal structures 2. Absorption – regulates the transport of substances into the body eg. Small intestines 3. Sensations – Specialized sensory receptors derived from epithelial tissues eg. Cones and rods of retina, olfactory in the nose and taste buds 4. Secretion – release of ‘things’ specialized secreting epithelial tissues known as glands a. Exocrine – secretes to outside via ducts b. Endocrine – secretes hormones into blood stream Structure of epithelial – sits on top of basement membrane. (Figure 2) - Thin extracellular layer that separates epithelial from underlying connective tissues. - Acts as regulator for movement of molecules to deeper connective tissues - Acts to anchor epithelium to underlying connective tissues - Blacks chance molecules such as virus. Figure 2. Structure of Epithelial Classification of Epithelial tissue Shape a. Squamous – irregular sides flat, thin and wide. b. Cubodial – thicker and cubes c. Columnar – Column looking like (long skinny) Layers a. Simple – one single layer b. Stratified – multiple layers Types of Epithelium Simple squamous – digestive tract, absorption Simple cuboidal – absorption (nephron, kidneys) water absorption is most optimal Simple columnar: a. Non-ciliated – microvilli increases surface area for better absorption and secretion a. Goblet cells to produce mucin (digestive) b. Ciliated – hair like projections (goblets present) uterine and respiratory tract Figure 3a. Non-ciliated microvilli - Epithelial Figure 3b. Ciliated epithelium Stratified Squamous – adopted for protection (epidermis of skin) Stratified cuboidal – protection, lining of ducts and glands (exocrine) Stratified columnar – deep and plenty of protection, (male uretha and front of eyeball) Psuedostratified ciliated columnar – Fake layers every cell attached to basement membrane. respiratory system pushes up and out with mucin. Transitional epithelium – can flatten/thicken eg bladder when full they thinner and flat. When empty they are thick. 2. Connective tissues - Connective tissue proper (loose and dense) - Cartilage - Bone - Blood Development of Connective Tissues Mesenchyme are nonspecific embryological connective tissue. Functions of connective tissues: Support – bone forms framework and a place for muscle attachment - Cartilage forms frame work for structures like bronchi - Connective tissue proper forms capsules for organs Bind – Ligaments are bone to bone, tendons are muscle to bone Storage – Fat as connective tissue stores energy (adipose tissue) or bone is storage for calcium and phosphorous. Transport – Blood transport nutrients, waste and hormones. Protection – Adipose tissue protect vital organs like the kidneys as do skeletal protects brain, spinal cord, heart and lungs. Immune protections – connective tissue contain WBC to destroy poathogens. Connective tissue proper – comes divided into two categories: 1. Connective tissue proper loose 2. Connective tissue proper dense Connective Tissue Proper Loose – Areolar, Adipose, Reticular 1. Areolar – least specialized broad function, holds water around capillaries a. Found in almost all different type of cells and fibers - Fibroblasts are cells in Areolar tissue that produce protein fibers and ground substance (Viscous fluid, colour-less solution – tissue filler added extra support and movement of nutrients) i. Collagen (white) – strong, flexible yet resistant to stretching ii. Elastic (Yellow) – made of elastin; allow for stretch and recoil iii
More Less

Related notes for KINE 2031

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