The Cell
The Basic Building Block of the human body.
What is the cell?
A collection of tissues forming a structure like the stomach.
What is an organ?
Thin structure (50–150 nm) on which epithelial cells sit.
The earliest connective tissue that forms from the middle germ layer.
What is mesenchym?
White-staining fibers that provide high tensile strength.
What are collagen fibers?
Most human cells are in the size of micrometers.
What is 10-20 micrometers?
Organs working together for a shared function.
What is an organ system?
This junction type tightly seals the apical circumference of epithelial cells.
What is the zonula occludens?
Connective tissue cells that produce intercellular precursors in fibrillogenesis.
What are fibroblasts?
Yellowish fibers that can stretch 100–150% and form fenestrated membranes in the aorta.
What are elastic fibers?
Cells floating freely in a liquid environment tend to take on this shape.
What is spherical?
This tissue type includes surface coverings such as skin.
What is epithelium?
Complicated folded epithelial formations in glands are called this.
What is parenchyma?
Pigment-containing cells originating from neuroectoderm.
What are melanocytes?
Thin, branching fibers demonstrated by silver impregnation.
What are reticular fibers?
When cells stay together after repeated divisions, they form this.
What is tissue?
Tissues #2–4 (connective tissue, cartilage, bone) sometimes share this common name.
What is connective tissue?
Supportive connective tissue beneath glandular parenchyma.
What is stroma?
Large phagocytic cells that become rounded and amoeboid when activated.
What are macrophages?
Embryonic connective tissue in the umbilical cord that protects placental vessels.
What is rosolic (or Wharton’s jelly–like) connective tissue?
These cells do not multiply after birth.
What are nerve cells?
The thymus contains this specialized epithelial network.
What is reticular (or trabecular) epithelium?
Name a multilayered epithelial type.
What is stratified squamous (tiled) epithelium?
(also acceptable: stratified cylindrical, transitional)
Free cells that produce humoral antibodies and arise from lymphocytes.
What are plasma cells?
This stronger-than-mesenchyme connective tissue already contains collagen and reticular fibrils.
What is rosolic connective tissue?