Adipose tissue has a branding problem. In casual conversation “fat” is shorthand for something to minimize, but as a tissue it performs jobs that have nothing to do with aesthetics: insulation, cushioning, hormone production, and one of the body’s two ways of generating heat. Understanding what adipose tissue actually does changes how it shows up…
Bone often gets treated as the fixed scaffolding the rest of physiology happens on — the thing that stays still while muscles, blood, and nerves do the interesting work. That’s a mistake. Bone is a living, constantly remodeling connective tissue, and understanding how it rebuilds itself is central to managing fractures, osteoporosis, and almost anything…
Understand the physiology behind heat and cold therapy in physical therapy — when to use each modality, how they work, and what the science says about their effects on healing. “Should I put ice or heat on it?” It is one of the most common questions physical therapists receive. The answer, according to modern physiology…
Understand the biology of pain — from acute nociception to chronic sensitization — and how physical therapy uses pain neuroscience to reduce chronic pain and restore function. Pain is the most common reason people seek physical therapy. Yet despite its ubiquity, pain remains widely misunderstood — both by patients who experience it and, historically, by…
Understand how the body maintains pH balance, what happens during exercise-induced acidosis, and how acid-base physiology relates to physical therapy and rehabilitation. The human body is remarkably sensitive to changes in its internal chemical environment. Among the most tightly regulated variables is pH — the measure of acidity or alkalinity of body fluids. A shift…
Explore how the body metabolizes proteins and amino acids, why protein turnover is central to muscle repair, and how physical therapy patients can optimize protein metabolism for recovery. When a muscle is injured or a tendon repaired, when a bone is healing or scar tissue is being remodeled, the body must manufacture new proteins. This…
Learn how epithelial tissue protects the body, how skin wounds heal, and how physical therapy supports skin integrity and wound management. When most people think of physical therapy, they picture exercises for joint injuries or stroke rehabilitation. But physical therapists also play a crucial role in wound care, skin integrity, and the management of conditions…
Learn how cell division enables the body to repair damaged tissues, replace worn-out cells, and rebuild after injury — and how physical therapy supports this process. Every time you cut your finger, strain a muscle, or fracture a bone, your body launches a remarkable repair operation. Damaged cells are replaced, new tissue is built, and…
Understand the three phases of tissue healing — inflammation, proliferation, and remodeling — and how physical therapy supports each stage of the regenerative process. The human body’s capacity to heal itself is one of nature’s most remarkable achievements. A broken bone rebuilds itself to near-original strength. A torn tendon gradually restores tensile capacity. A skin…
Compare how the nervous and endocrine systems regulate body functions, what each contributes to physical therapy outcomes, and how therapeutic interventions target both systems. The human body’s internal communication relies on two master control systems: the nervous system and the endocrine system. Both systems detect changes in the body’s internal and external environment and coordinate…