Neural Control of Thermoregulation
The nervous system is important to thermoregulation, as illustrated in Figure 14.23. The processes…
Endotherms and Ectotherms
Animals can be divided into two groups: some maintain a constant body…
Negative Feedback Mechanisms
Any homeostatic process that changes the direction of the stimulus is a negative…
Nervous Tissues
Nervous tissues are made of cells specialized to receive and transmit electrical…
Muscle Tissues
There are three types of muscle in animal bodies: smooth, skeletal, and…
Connective Tissues
Connective tissues are made up of a matrix consisting of living cells and…
Animal Primary Tissues
Multicellular, complex animals have four primary types of tissue: epithelial, connective, muscle,…
Animal Body Planes and Cavities
A standing vertebrate animal can be divided by several planes. A sagittal plane divides…


