DIGESTIVE SYSTEM

• digestive system is responsible for breaking down foods that can be absorbed by our body
• the process of digestion : chewed, contracted, mixed with gastric juices to break down proteins, the minerals are absorbed in the bloodstream, water absorbing and forming into feces, then pooped out the body
• Peristalsis is the muscle responsible for contracting to move foods into disgestive tract
• bolus is the food that has been chewed and mixed with saliva
• chyme is mixture of food and digestive juices that is produce in stomach
• villi is a small intestine that looks like a tiny finger that increases the absorption of nutrients
• liver produces bile which is stored in the gall bladder and released into the small intestine
• muscular system is responsible for moving the body and maintaining body posture
• skeletal muscle is attached to bones
• cardiac muscles is walls of the heart
• smooth muscles is walls of internal organs
• skeletal muscle is the largest and numerous type of muscle tissue, they are responsible for voluntary movements
• skeletal muscle are striated, multinucleate, voluntary, and attach to bone by tendons
• skeletal tissues is multinucleated and have striated look because of the arrangement of actin and myosin
• smooth muscles are responsible for involuntary movements
• it has splinded shape and and have a single nucleus
• cardiac muscles is also known as cardiomyocytes
• cardiac muscles are involuntary, branched, and striated
• integumentary system serves as protection from the outside, helps sensory perception, and maintaining homeostasis
• 3 layers of skin are epidermis, hypodermis, and dermis
• epidermis is the outermost layer and contains keratinocytes
• dermis is in the middle and contains collagen, glands, and elastic fibers
• hypodermis is subcutaneous layer and contains fat and connective tissue
• hair and nails is not part of integumentary system
• hair contains keratin and and located in dermis
• nail is composed of keratin and located in epidermis
• integumentary composed of 3 glands : oil glands, sweat glands, and mammary glands
• lympathic system is responsible for regulating the fluid inside the body, protects it from the foreign substances and removes waste, and defend against deseases
• lympathic vessels are thin walled, transport lymphs, clear fluid contains white blood cells, one way valve
• lymph nodes is filters lymph, removes bacterias and identify them, small bean shaped
• spleen largest lympathic organ and filters blood
• small intestine absorbs most nutrients
• large intestine absorbs water, then passes through th anus