The skeletal system provides support for posture and movement; stores lipids and calcium; produces blood cells in the marrow; protects the organs; and provides leverage for muscles. Bones contain spongy and compact sections and are divided into the epiphysis (ends) and diaphysis (middle). Bones also include a periosteum (outer layer), articular cartilage, lacunae, canaliculi, bone matrix, osteons, central canals, and medullary cavity. Mature bone cells are called osteocytes, while osteoblasts are found more often during growth and development. Osteoclasts wear away bone that isnt needed. Nutrition, hormones, and exercise all affect bone growth and health. Red bone marrow produces blood cells while yellow marrow stores fat. Bone conditions and disorders include fractures, osteoporosis, osteochondrodysplasia, and rickets.
The functions of bones include support, storage, production of blood, protection, and leverage
Bone anatomy includes terms such as: compact bone, spongy bone, epiphysis/diaphysis, periosteum, articular cartilage, lacunae, canaliculi, matrx, osteons, central canal, and medullary cavity
Bone cell types include osteocytes, osteoblasts, and osteoclasts
Bone movements can be related to a lever with the terms fulcrum, resistance, and force
Nutrition, hormones, and exercise can affect bone growth and development (ossification)
Bone marrow is red or yellow and contained within bone for blood cell production and fat storage
Bone conditions/disorders include fractures, osteopenia, osteoporosis, osteochondrodysplasia, and rickets
Did you know…
Q: Is it possible to have overactive osteoblasts?
A: Yes, if osteoblast activity were too high then a person would be making too much bone tissue (when it’s not necessary). One example is fibrodysplasia ossificans progressiva, which is mentioned later on in the muscular system lesson (it’s a disorder that turns damaged muscle tissue and other tissues into bone when healing!)
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book is the ninth edition of the top-selling Human Anatomy & Physiology text and the authors have produced the most accessible, comprehensive, up-to-date and visually stunning anatomy & physiology textbook on the market.. It presents information in smaller and more digestible bites, making it easier to read and navigate.
This book has a superb balance between structure and function and continue to emphasize the correlations between normal physiology and pathophysiology, normal anatomy and pathology, and homeostasis and homeostatic imbalances. The acclaimed illustration program continues to be refined and is unsurpassed in the market. The thirteenth edition is fully integrated with a host of innovative electronic media, including WileyPlus 5.0 (access purchased separately.) No other text and package offers a teaching and learning environment as rich and complete.
This book includes updated examples, references, and dozens of illustrations. Readers of the new edition will come to understand the meanings of terms in anatomy and physiology, get to know the body's anatomical structures, and gain insight into how the structures and systems function in sickness and health. It also features updated information on how systems function in illness and in health.