Sci (Anatomy)

• An organ is a collection of tissues joined in a structural unit to serve a common function
• The main tissue of the heart is the cardiac muscle, which performs the heart's major function of pumping blood and is found in the heart.
• The circulatory tissues control the beating of the heart. The connective tissues make up heart valves that keep blood flowing in just one direction through the heart.
• Vital Organs

  • heart
  • brain
  • kidneys
  • liver
  • lungs
• The heart is located at the center of the chest, and its function is to keep blood flowing through the body. Blood carries substances to cells that they need and also carries away waste from cells.
• The brain is located at the center of the skull and functions as the body's control center. It has your thoughts, memories, perceptions, and feelings
• The kidneys are located in the back of the abdomen on either side of the body. Their function is to filter blood and form urine, which is excreted from the body.
• The integumentary system includes the skin, hair, and nails. It encloses and protects the body and is the site of many sensory receptors.
• The skin is the body's first defense against pathogens, and it also helps regulate body temperature and eliminates wastes in sweat.
• The skin is the largest organ in the body.
• The skeletal system consists of bones, joints, and teeth.
• The skeletal system's function is to support the body and give it shape. Along with the muscular system, it enables the body to move. They also protect internal organs, store calcium, and produce red and white blood cells.
• The bones of the skeletal system is connected by tendons, ligaments, and cartilage.
• The muscular system consists of three (3) different type of muscles; skeletal muscles, smooth muscle tissues, and smooth muscles.
• Skeletal muscles are attached to bones by tendons and allow voluntary movements of the body.
• Smooth muscle tissues control the involuntary movements of internal organs such as the organs of the digestive system, allowing food to move through the system.
• Smooth muscles in the blood vessels allow vasoconstriction and vasodilation and thereby help regulate body temperature.
• The nervous system includes the brain and spinal cord, which make up the central nervous system.
• The nervous system controls the voluntary and involuntary responses of the human organism and also detects and processes sensory information.
• The endocrine system is made up of glands that secrete hormones into the blood which carries the hormones throughout the body.
• Endocrine hormones are chemical messengers that control many body functions, including metabolism, growth, and sexual development.
• Pituitary gland produces hormones that control other endocrine glands.
• Some of the other endocrine glands include the pancreas, thyroid gland, and adrenal glands.
• The cardiovascular system includes the heart, blood, and three (3) types of blood vessels: arteries, veins, and capillaries.
• The heart pumps blood, which travels through the blood vessels.
• The main function of the cardiovascular is transport oxygen from the lungs and nutrients from the digestive system are transported to cells throughout the body.
• Carbon dioxide and other waste materials are picked up from the cells and transported to organs such as the lungs and kidneys for elimination from the body.
• The cardiovascular system equalizes body temperature and transports endocrine hormones to cells in the body where they are needed.
• The urinary system includes kidneys, ureters, urinary bladder, urethra.
• The kidneys filter excess water and a waste product called urea from blood and from urine. They also produce an enzyme called renin and a variety of hormones. These substances help regulate blood pressure, the production of red blood cells, and the balance of calcium, and phosphorus in the body.
• Two (2) tubes called ureters carry the urine from the kidneys to the urinary bladder, which stores the urine until it is excreted from the body through another tube named the urethra.
• The respiratory system includes the nasal passages, lungs and a long tube called the trachea.
• The main function of the respiratory system is to deliver oxygen to the blood and remove oxygen. Gases are exchanged between the lungs and blood across the walls of capillaries lining tiny air sacs (alveoli) in the lungs
• The lymphatic system is considered to be part of the immune system. It consists of lymph vessels and ducts that collect excess fluid (lymph) from extracellular spaces in tissues and transport the fluid to the bloodstream.
• Lymph nodes are small masses of tissue containing white blood cells that fight infection. Lymphocytes are produced by bone marrow and mature in the thymus gland. The spleen filters out old or damaged blood cells and bacteria from the blood.
• The thymus gland in the lymphatic system produces some types of white blood cells (lymphocytes) that fight infections.
• The digestive system consists of the organs including the mouth, esophagus, stomach, small and large intestines, and gastrointestinal tract.
• The digestive system main function is to absorb nutrients, and remove waste excreted.
• The digestive system includes accessory organs such as pancreas and liver produces enzymes and other substance needed for digestion but through which food does not actually pass.
• The reproductive system is the only body system that differs substantially between individuals.