Tissues

Question 1

What are the types of tissues?

Answer 1

• Epithelial
• Connective
• Nerve
• Muscle

Question 2

Epithelia Tissue

Answer 2

• Closely spaced
• Protection, secretion, absorption, excretion, filtration
• Ex: Glands, Digestive tract, epidermis

Question 3

Connective Tissue

Answer 3

• More matrix than cells
• Supportive: binds other tissues together
• Ex: Blood, bone, cartilage, fat

Question 4

Nerve Tissues

Answer 4

• Contain excitable cells
• Internal communication
• Ex: Brain, spinal cord, nerves

Question 5

Muscle Tissue

Answer 5

• Contracts to cause movement
• Contains excitable cells
• Ex: Skeletal muscles, Heart

Question 6

What are special characteristics of epithelia

Answer 6

• Avascular (no blood flow)
• Close to connective (via the basement membrane)
• Regeneration

Question 7

How do you classify epithelia?

Answer 7

• Simple: one layer, good for absorption secretion and filtration
• Stratified: multiple layers, good for protection in high abrasion areas
  Can be…
• Squamous
• Cuboidal
• Columnar

Question 8

Simple squamous epithelium

Answer 8

• Single layer of flattened
• Good for diffusion and filtration
• Ex: Alveoli

Question 9

Simple cuboidal epithelium

Answer 9

• Single layer of cube-like cells
• Good for secretion and absorption
• Ex: Kidney tubules

Question 10

Simple columnar epithelium

Answer 10

• Single layer of tall cells, some with cilia
• Good for absorption and secretion of mucus (goblet cells)
• Ex: Digestive tract

Question 11

Pseudostratified columnar epithelium

Answer 11

• Same as columnar
• Bear cilia and goblet cells
• Secrete mucus
• Ex: Trachea

Question 12

Stratified squamous epithelium

Answer 12

• Thick membrane of several cell layers
• Can be keratinized (surface layer of dead cell) or non-keratinized (no surface layer of cells)
• Good for protection
• Ex (keratinized): Epidermis
• Ex (non-keratinized): Esophagus

Question 13

Stratified cuboidal and columnar epithelia

Answer 13

Rare in the body

Question 14

Transitional epithelium

Answer 14

• Resembles both stratified squamous and stratified cuboidal
• Unique to the urinary tract
• Stretches and swells regularly

Question 15

Glandular epithelia

Answer 15

• A gland is one or more cells that makes and secretes an aqueous fluid
• The only important unicellular exocrine gland is the goblet cell
• Multicellular exocrine glands have a duct and a secretory unit

Question 16

What are the 4 classes of connective tissue?

Answer 16

1. Connective tissue proper
2. Bone
3. Blood
4. Cartilage

Question 17

What are the functions of connective tissue?

Answer 17

• Provide a structural framework
• Transport fluids nd dissolved material
• Protect delicate organs
• Store energy