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The anatomical position is a standard reference posture where the body stands upright facing the observer, feet together and parallel, arms at the sides with palms forward, and head and eyes directed forward.
This position ensures consistent anatomical descriptions.
The three main planes are the sagittal plane (divides body into left and right), coronal plane (divides into anterior and posterior), and transverse plane (divides into superior and inferior).
These planes allow for standardized views of body structures.
The major body cavities are the dorsal cavity (cranial and spinal) and ventral cavity (thoracic, abdominal, and pelvic).
The ventral cavity is separated by the diaphragm into thoracic and abdominopelvic regions.
The four primary tissue types are epithelial (covering and lining), connective (support and binding), muscle (contraction), and nervous (communication and control).
These tissues combine to form organs.
The skeletal system provides support, protection for organs, enables movement via muscle attachments, stores minerals like calcium, and produces blood cells in bone marrow.
It consists of 206 bones in adults.