FNN 111 Chapter Notes - Chapter 9: Bone Density, Collard Greens, Turnip

• School: Ryerson University
• Department: Nutrition and Food
• Course: FNN 111
• Professor: Sharon Wong

Document Summary

Bones are living organs containing several tissues, incl. two types of bone tissue cartilage and connective tissue. The composition of bone provides strength and flexibility. About 65% of bone tissue is made up of an assortment of minerals (mostly calcium and phosphorus) providing hardness; remaining 35% is a mixture of organic substances providing strength, durability, and exibility. Within bones, minerals form tiny crystals (called hydroxyapatite) that cluster around: most imp. is collagen collagen bres. Two distinct types of tissues in bones: enables weight bearing, cortical bone also called compact bone, is very dense; constitutes approx. The constant activity of bone tissue promotes bone health. Bones develop through a series of three processes: bone growth, bone modelling, bone remodelling. Bone growth and modelling determine the size and shape of our bones. First period of rapid growth is from birth to age 2. Continues in spurts throughout childhood and adolescence. Girls reach adult height at age 14; boys at age 17.