Special Sub-Topic: Histology is not Fun! Click Here To Play: Histology is not Fun!

Starting with the basics, the four types of tissue in the body are...

Epithelium, Connective, Muscle, Nervous. Epithelium lines, covers, and secretes. Connective tissue has numerous tasks such as connection, anchoring, etc. Muscles contract. Nerves conduct impulses.

Connective tissue is the most diverse type of tissue, it includes...

All of these (Blood, Bone, Adipose tissue). Adipose tissue is fat. Blood is a tissue, even though most people do not think of it as such. Bone is bone. Connective tissue is relatively acellular. Most of it is matrix and fibers. There are thirteen total types of connective tissue. They are: mesenchyme, mucoid, areolar, reticular, dense regular white, dense regular yellow (elastic), dense irregular, bone, hyalin cartilage, fibrous cartilage, elastic cartilage, adipose, bone, and blood.

Red blood cells are not actually cells, they are...

Corpuscles. RBC's are not cells. They give up their organelles and nuclei to transport oxygen with the most efficiency.

Which of the following is not a epithelial tissue?

Pseudostratified squamous. There are eight types of epithelium. They are: simple squamous, simple cuboidal, simple columnar, stratified squamous, stratified cuboidal, stratifed columnar, pseudostratified columnar, and transitional. Epithelium is very cellular with little matrix. It can produce secretions, therefore, it makes up all glands.

Which of the following is not a muscle tissue?

Weak. There are three types of muscle tissue. They are skeletal, cardiac, and smooth. Skeletal and cardiac muscle are striated. Smooth muscle is not.

There is only one type of nervous tissue. Nervous tissues have conducting membranes. Which other tissue type also has this?

Muscle. Muscle tissue has conducting membranes to perform contractions. A certain type of epithelium can also contract.

Which connective tissue is the most widespread in the body?

Areolar. Areolar connective tissue makes up most of the basement membranes and stroma of organs.

Stratified squamous epithelium has two functional forms; they are...

Cornified and noncornified. Cornified stratifed squamous epithelium has 5-20 layers of dead cells filled with keratin. Noncornified does not. Cornified can be found on outer skin layers. Stratified squamous epithelium can be identified by the apperance of papillations at their basement membrane. The bottom cells are actually cuboidal.

Which of the following is not a fiber produced by connective tissue?

Long. White fibers are strong and form tendons. Yellow fibers are more elastic, but not as strong. Reticular fibers closely resemble white fibers, but stain with silver.

Studying histology involves looking into a microscope at stained tissue. What stain colors adipose yellow?

Sudan IV. Osmium is used to stain yellow fibers. Silver can stain reticular and epithelium. Alcohol decolorizes fat, so all you see are clear white blobs.