BIOL.122 Lecture 3

complete

Name 5 types of connective tissue

Loose CT. Dense CT. Cartilage. Bone. Blood

What is the role of most CT

To provide strength and support

Adipose tissue role

Energy storage

Examples of loose CT

areola, adipose, reticular

Examples of dense CT

Regular, irregular, elastic

Three cartilage types

hyaline, elastic, fibrocartilage

structure of reticular connective protein fibres

thin and branched collagen with other proteins

Qualities of collagen protein fibres

non elastic, strong, flexible

Qualities of elastic protein fibres

‘rubbery’, fibrillin and elastin

Qualities of reticular protein fibres

thin and branched collagen. much looser, associated with internal organs

where is areola CT found

surrounding blood vessels and nerves

what is the role of areolar CT

protects nerves and vessels from mechanical stressors, the fibroblasts also secrete collagen

name the three types of protein fibres

collagen, elastic, reticular

what role is adipose tissue adapted to

storage of triglycerides for energy, shock absorption, thermal insulation

Structure of Regular Dense CT

Closely packed parallel collagen fibres

where is regular dense CT found

areas where tension is exerted along axis of fibres. eg tendons, ligamentsm cornea, and sclera

Why is regular dense CT used

for protection

structure of dense irregular CT

thick and irregular collagen fibres

where is dense irregular CT found

where tension is exerted in different planes eg the skin dermis.

role of elastic CT

combines strength with elasticity

where is elastic CT found

artery walls

what is a molecule with many hydrophobic regions

elastin

what is the most widely distributed cartilage

hyaline

what is the role of hyaline cartilage

firm support with flexibility, shock absorption

what is articular cartilage

cartilage at the ends of long bones to help reduce joint friction

where is elastic cartilage found

places where strength and flexibility is found

structure of fibrocartilage

parallel collagen fibres with chondrocytes

qualities of fibrocartilage

strong and rigid

where is fibrocartilage found

where strong support is needed, eg intervertebral discs.

structure of bone

collagen fibres with matrix of inorganic calcium salts

role of bone

\-supports and protects soft tissues

\-fat storage

\-synthesis of blood cells

\-storage of stem cells

exocrine secretion types

unicellular, multicellular

glandular epithelium secretion types

endocrine and exocrine

merocrine secretion

very common, often by goblet cells

types of secretion from common to rare

merocrine, apocrine, holocrine

what is the difference between simple and compound glands

simple have no branching, compound does branch

what type of CT is blood

Atypical, liquid

What are red and white blood cells surrounded by

fluid plasma matrix

What is seen in both types of gland

tubular, tubular coiled, acinar