Histology - Lab 1 Continued

Question 1

Simple Cuboidal Epithelium

Answer 1

Location: kidney tubules, follicles of thyroid gland, surface of ovary

Function: Absorption and secretion

Image: (bottom cells)
Single layer of cells that are similar in size with spherical central nucleus

https://anatomy.mheducation.com/html/human/Tissues/images/HistSseLimMdi.jpg

Question 2

Simple Squamous Epithelium

Answer 2

Location: alveoli in lungs, capillaries

Function: Diffusion, filtration

Image: (top cells)
Single layer of flat, irregular (stretched oval) cells with flat nucleus

https://anatomy.mheducation.com/html/human/Tissues/images/HistSseLimMdi.jpg

Question 3

Simple Columnar Epithelium

Answer 3

Location: digestive tract

Function: absorb nutrients, secrete mucus

Image:
Tall cells with oval nucleus. May have goblet cells

https://anatomy.mheducation.com/html/human/Tissues/images/HistSncLimMdi.jpg

Question 4

Psuedostratified Columnar Epithelium

Answer 4

Location: respiratory tract, parts of urinary tract

Function: produce and secrete mucus

Image: Single layer of cells (all touch basement membrane), nuclei at different levels, usually with cilia

https://anatomy.mheducation.com/html/human/Tissues/images/HistPepLimMdi.jpg

Question 5

Stratified Squamous Epithelium (keratinized)

Answer 5

Location: Epidermis

Function: protection, barrier to inside

Image:
Multiple layers of cells. Apical (top) cells are squamous (dead cells with keratin) but basal/basement cells are cuboidal.

(The red layer and above is Stratified Squamous Epithelium)

https://anatomy.mheducation.com/html/human/Tissues/images/HistSskLimMdi.jpg

Question 6

Transitional Epithelium (Urothelium)

Answer 6

Location: Urinary bladder

Function: expansion in urinary tract, changes with urinary volume.

Image: Multiple layers of cells that changes with expansion. When expanded, cells look like umbrellas. When flattened, cells are like domes.

(Top bundle of cells, below is basement membrane and connective tissues)

https://anatomy.mheducation.com/html/human/Tissues/images/HistTepLimMdi.jpg

Question 7

Areolar Connective Tissue

Answer 7

Location: under skin, around neurovascular bundles

Function: Supports and binds. Mostly collagenous fibers and elastic fibers. The extracellular matrix is like gel with lots of proteins

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistArcLimMdi.jpg

Question 8

Adipose Connective Tissue

Answer 8

Location: kidneys, subcutaneous

Function: Energy storage, cushions. Made up of adipocytes, a large empty cell.

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistAdtLimMdi.jpg

Question 9

Reticular Connective Tissue

Answer 9

Location: Spleen, lymph nodes

Function: provides framework for cells. Reticular fibers are produced by fibroblasts.

Image: Tree branches
https://anatomy.mheducation.com/html/human/Tissues/images/HistRctLimMdi.jpg

Question 10

Dense Regular Connective Tissue

Answer 10

Location: Tendons and ligaments

Function: resists pulling forces in one direction. Collagen runs in one direction like multiple waves

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistDrtLimMdi.jpg

Question 11

Dense Irregular Connective Tissue

Answer 11

Location: dermis, bursa (joints)

Function: resist pulling forces from most directions with random and compact collagen

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistDitLimMdi.jpg

Question 12

Elastic Connective Tissue

Answer 12

Location: Aorta

Function: Stretches and recoils. Lamellae (wavy sheets) contains elastin so blood vessels can be elastic

Image: (dark purple lines are lamellae within elastic connective tissue)
https://anatomy.mheducation.com/html/human/Tissues/images/HistEltLimHim.jpg

Question 13

Hyaline Cartilage

Answer 13

Location: End of bones, trachea

Function: flexible support, cushions joints. No fibers but contain chondrocytes in lacuna that develop more cartilage.

Image: looks like seeds in a fruit
https://anatomy.mheducation.com/html/human/Tissues/images/HistHcaLimMdi.jpg

Question 14

Fibrocartilage

Answer 14

Location: intervertebral discs

Function: resist compression and absorb shock. Also contains round chondrocytes in lacuna.

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistFcaLimMdi.jpg

Question 15

Elastic Cartilage

Answer 15

Location: Ears and epiglottis

Function: Bend and snaps. Contains both hyalin cartilage and elastic fibers.

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistEcaLimMdi.jpg

Question 16

Compact Bone

Answer 16

Location: bones

Function: Supporting connective tissues. Osteon is the structural support of compact bones, they look like empty holes.

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistCboLimMdi.jpg

Question 17

Blood

Answer 17

Location: blood vessels, heart

Function: transports oxygen and carbon dioxide

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistBldLimMdi.jpg

Question 18

Skeletal Muscle

Answer 18

Location: Between bones

Function: Complex movements. Contains lots of flat nuclei on the side of long cells

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistSmuLimHim.jpg

Question 19

Cardiac Muscle

Answer 19

Location: heart

Function: Allows the heart to contract. One or two nuclei in the center of muscle fiber.

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistCmuLimHim.jpg

Question 20

Smooth Muscle

Answer 20

Location: Walls of hollow organs

Function: involuntary movement. Spindle shaped with central nucleus.

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistSmmLimHim.jpg

Question 21

Nervous Tissue

Answer 21

Location: CNS, PNS

Function: Receive and send nerve impulses. Specialized with axon and dendrites.
Consists of neurons and neuroglia (glial) cells

Image:
https://anatomy.mheducation.com/html/human/Tissues/images/HistNvtLimHim.jpg