Connective Tissue © Richard Harris / BIODIDAC Connective tissue serves a "connecting" function in the body. It supports and binds other tissues. Connective tissue typically has cells ... Read More

With all of the talk about steroids, it occurred to me that some may not know exactly what steroids are. Steroids are lipid-soluble hormones that are derived from cholesterol. They control growth ... Read More

Proteins are very important molecules in our cells. They are involved in virtually all cell functions. All proteins however are not the same. Each protein within the body has a ... Read More

Human cells contain 23 pairs of chromosomes for a total of 46. There are 22 pairs of autosomes and one pair of sex chromosomes. The sex chromosomes are the X ... Read More

© Steve Berg, used with permission Mendel's law of segregation states that allele pairs separate or segregate during gamete formation, and randomly unite at fertilization. There are four main ... Read More

Researchers have shown that monkeys are able to add mentally, almost as well as humans. In the study, the monkeys were shown two different sets of dots on two computer screens. ... Read More

Epithelial CellImage copyright Dennis Kunkel The word tissue is derived from a Latin word meaning to weave. Cells that make up tissues are sometimes woven together with extracellular ... Read More

Heart nodal tissue is a specialized type of tissue that functions as both muscle and nervous tissue. Nodal tissue contracts like muscle tissue and generates nerve impulses like nervous tissue. The ... Read More

Researchers have discovered that people suffering from body dysmorphic disorder (BDD) have a brain disfunction that causes them to see themselves abnormally. The brain abnormality involves the process by which BDD ... Read More

Biology experiments are popular with people of all ages. How would you like to make a model of a neuron using Jell-O or watch the color of a bird change before ... Read More

Image courtesy of MedValet Valves are flap-like structures that allow blood to flow in one direction. The heart has two kinds of valves, atrioventricular and semilunar valves. The atrioventricular ... Read More

Do you know what hematopoiesis means? Biology can be filled with words that sometime seem incomprehensible. By "dissecting" these words into discrete units, even the most complex terms can be ... Read More

Texas Coastal EstuaryPhoto: USFWS Aquatic communities are the world's major water habitats. Like land biomes, aquatic communities can also be subdivided based on common characteristics. Two common designations of aquatic ... Read More