The drawing above shows the following types of connective tissue:
– dense regular connective tissue
– elastic cartilage
– adipose tissue

These three drawings were the ones that had clear photographs on the Getaprofessor website. The tissue that appeared most in those photographs was the elastic cartilage.

1. Dense Regular Connective Tissue
– The original photo had a label that the tissue was from a tendon. Tendons attach muscles to bones and/or other structures. Tendons are white in color because they are avascular (or poorly vascularized). This means that they lack blood supply. Though not very clear in the drawing, tendons have parallel fibers as compared to dense irregular connective tissue.

Tendons are found in various parts of the body, most especially in the muscle and skeletal systems. They connect your muscles to your bones in the elbow, knee, and shoulder.

In the drawing, there is the perichondrium. The perichondrium is a dense layer of connective tissue that covers the external surface of cartilage. Additionally, it contains blood vessels that strengthen and nourish cartilage by long-range diffusion.

Junqueira’s Basic Histology mentions that there are 2 major types of adipose tissue–white and brown. In the first comment, I mentioned that the adipose tissue in the drawing was white.

White adipose tissue has one large cytoplasmic droplet. On the other hand, brown adipose tissue has multiple droplets interspersed between mitochondria (giving the cell a darker appearance). Brown adipocytes are also smaller than white fat cells.

White adipose tissue is the more common type specialized for fat storage. Brown adipose tissue release heat and functions to warm the blood.