Bio 221 - Lab 2

Histology/Integumentary

For each of the specific tissues, know:

·  To which of the four primary tissue types the specific example belongs

·  The complete name of the tissue

·  One location of the tissue

·  One function of the tissue

·  The assigned histological details of each tissue

I.  Epithelial Tissue: This tissue covers and lines surfaces inside & outside of the body. Glands are also derived from epithelial tissue. Typically this tissue is arranged in layers and composed of a specific type of epithelial cell, based on shape. The tissue is secured to deeper connective tissue by way of a thin basement membrane. A free surface that is not attached to any other tissue is found on the side opposite that of the basement membrane. Air or a body fluid may contact the free surface of the epithelium.

A.  Simple squamous epithelium (epithelium or epithelial tissue)

B.  Simple cuboidal epithelium

·  cuboidal epithelial cell

·  free/apical surface

·  basement membrane

C.  Simple columnar epithelium

·  columnar epithelial cell

·  free/apical surface

·  basement membrane

D.  Pseudostratified ciliated columnar epithelium

·  columnar epithelial cell

·  free/apical surface

·  cilia

·  goblet cell

·  basement membrane

E.  Stratified squamous epithelium

·  squamous epithelial cell

·  free/apical surface

·  basement membrane

F.  Transitional epithelium

·  cuboidal epithelial cell

·  free/apical surface

·  basement membrane

II.  Connective Tissue: This tissue is characterized by cells scattered in a non-cellular substance called matrix. The cell types vary as does the amount and composition of the matrix found between the cells.

A.  Bone/Osseous connective tissue

·  osteocyte

·  lacuna

·  central canal

·  lamella

B.  Hyaline cartilage

·  chondrocyte

·  lacuna

·  matrix

C.  Fibrocartilage

·  chondrocyte

·  lacuna

·  collagen fiber (in the matrix)

D.  Dense fibrous tissue

·  fibroblasts (just their nuclei can be seen; however, these cells may not be visible at all)

·  collagen fibers

E.  Areolar tissue

·  fibroblasts (just their nuclei can be seen)

·  collagen fibers

·  elastic fibers

F.  Adipose tissue

·  Fat cell/signet ring cell/adipocyte

·  nuclei

·  Fat vacuole

G.  Reticular tissue

·  reticular fibers

H.  Blood/Vascular tissue

·  white blood cell/leukocyte

·  red blood cell/erythrocyte

·  plasma (this is the name of blood matrix)

III.  Muscle Tissue: Muscle tissue cells are called fibers. These cells vary in their number and location of nuclei, their shape, and whether or not they appear banded (i.e. striated).

A.  Skeletal

·  nuclei

B.  Cardiac

·  Nucleus/nuclei

·  intercalated disc

C.  Smooth

·  nucleus

IV.  Nervous Tissue: Nervous tissue includes two major categories of cells, neurons and neuroglia. The study of neuroglia will be reserved for lecture. Neurons will be studied in more detail in later labs.

A.  Neuron

·  cell body

·  processes

V.  Integumentary System/Skin:

A.  Layers

·  Epidermis

·  Dermis

ü  Papillary layer

ü  Reticular layer

·  Hypodermis/Subcutaneous tissue (note: this is not a layer of the skin but is a layer deep to the skin)

B.  Structures

·  Dermal papilla(e)

·  Sebaceous gland

·  Sweat gland

·  Hair shaft

·  Hair follicle

·  Arrector pili (muscle)

·  Meissner’s corpuscle (found in dermal papillae)

·  Pacinian/lamellar corpuscle

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Biol 221 Anatomy& Physiology

Histology Worksheet

Major Tissue Type / NAME OF TISSUE / ILLUSTRATION
Include all Assigned Details / LOCATION
(Learn one) / FUNCTION
(Learn one)
Epithelial Tissue
Epithelial Tissue / Simple Squamous
Simple Cuboidal / Secretion or filtration
Simple Columnar / Lines small intestine / Secretion or absorption
Pseudostratified Ciliated Columnar / Lines trachea / Secretion & movement of mucous
Stratified Squamous / Protection from wear & tear
Transitional / Stretches
Connective Tissue
Connective Tissue / Bone
(Osseous Tissue) / Skeleton
Hyaline Cartilage / Flexible attachment, protection,
growth
Fibrocartilage / Compression
Dense Fibrous / Attachment
Areolar
Adipose
Reticular / Supports
Blood / Blood vessels, heart chambers
Muscular Tissue / Skeletal Muscle / Attached to skeleton / Moves body or skin
Cardiac Muscle / Moves blood
Smooth Muscle / Moves substances
Nervous Tissue / Neuron / Brain, spinal cords, nerves / Conducts impulses

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