Ian W
Overview of Human Anatomy and Physiology The human body has 206 bones, about 650 muscles, 78 to 80 organs, and a wide network of blood vessels. All of these parts work together, with each cell playing its own role to keep us alive. Two main fields help us understand how our bodies function: physiology, which … Read more
Why Muscle Anatomy Matters Skeletal muscles make up about 40% of an adult’s body weight. They work together in groups, contracting and relaxing in specific patterns controlled by the nervous system to create all voluntary movements, from blinking to sprinting. Knowing muscle anatomy is crucial for healthcare professionals when planning surgeries, diagnosing nerve injuries, developing … Read more
Overview of Human Bone Anatomy Human skeleton anatomy describes the bones inside our body that give us shape and support. The skeleton helps us stand, sit, walk, and move. It also protects important organs like the brain, heart, and lungs. At birth, a human baby has about 270 bones. As we grow, some bones join … Read more
Overview of Cervical Spine Anatomy The cervical spine, also called the neck, is the upper part of your spine.[1] The cervical spine anatomy consists of seven small bones called cervical vertebrae, labeled C1-C7.[1][2] These bones support your head and allow your neck to move.[3][1] The first two cervical vertebrae are special. The first one, C1, … Read more
Overview of Pancreas Anatomy The pancreas is a specialized organ that plays a crucial role in both digestion and hormone regulation.[1] It functions as an exocrine gland by releasing digestive juices and as an endocrine gland by producing essential hormones, such as insulin.[1][2] Pancreas anatomy is divided into four parts, with the uncinate process often … Read more
Overview of Neck Muscle Anatomy The neck muscle anatomy contains several muscles that help move the head in different directions.[1] These muscles are grouped based on their location in the neck: the front (anterior), side (lateral), and back (posterior) areas.[1] Each group of muscles has specific roles depending on where they are and how deep … Read more
Overview of Thyroid Anatomy The thyroid gland is a small, butterfly-shaped organ in the front of the neck.[1] It sits in the middle, just over the windpipe (trachea), and stretches from the C5 to T1 vertebrae in the spine.[1] This gland makes important hormones—thyroid hormones (T3 and T4) and calcitonin.[2] These helps control how the … Read more
Overview of Brain Anatomy The brain is a part of the control center of your body. It manages everything from your thoughts and emotions to your movements and memories. It also controls functions like breathing, heartbeat, and body temperature, running without you even noticing. Every part of who you are—your personality, reactions, and decisions—starts in … Read more
Overview of Brainstem Anatomy The brainstem is a small yet vital part of the brain. It is located at its base and connects the cerebrum (the largest part of the brain) to the spinal cord.[1] The brainstem anatomy consists of three main structures: the midbrain, the pons, and the medulla oblongata.[1] The thalamus is in … Read more
Overview of Midbrain Anatomy The midbrain, also known as the mesencephalon, is the topmost part of the brainstem.[1][2] It serves as a bridge between the cerebrum and diencephalon above and the pons below.[1] Despite of being 1.5-2 cm, it plays a vital role in several important functions, including vision, hearing, body movement, alertness, sleep cycles, … Read more