[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:03.15,0:00:06.57,Default,,0000,0000,0000,,NARRATOR: The human body\Nis a complex network
Dialogue: 0,0:00:06.57,0:00:11.58,Default,,0000,0000,0000,,of cells, tissues,\Nand organs that
Dialogue: 0,0:00:11.58,0:00:17.37,Default,,0000,0000,0000,,together make life possible.
Dialogue: 0,0:00:17.37,0:00:21.51,Default,,0000,0000,0000,,10 major systems are responsible\Nfor the body's functions--
Dialogue: 0,0:00:21.51,0:00:28.26,Default,,0000,0000,0000,,skeletal, muscular,\Ncardiovascular, nervous,
Dialogue: 0,0:00:28.26,0:00:34.30,Default,,0000,0000,0000,,endocrine, lymphatic,\Nrespiratory, digestive,
Dialogue: 0,0:00:34.30,0:00:37.64,Default,,0000,0000,0000,,urinary, reproductive.
Dialogue: 0,0:00:37.64,0:00:41.34,Default,,0000,0000,0000,,The skeletal, muscular,\Ncardiovascular,
Dialogue: 0,0:00:41.34,0:00:43.35,Default,,0000,0000,0000,,and nervous systems\Nin particular
Dialogue: 0,0:00:43.35,0:00:48.57,Default,,0000,0000,0000,,create an infrastructure that\Nfacilitates the other systems.
Dialogue: 0,0:00:48.57,0:00:53.13,Default,,0000,0000,0000,,The adult skeletal system is\Na framework of over 200 bones.
Dialogue: 0,0:00:53.13,0:00:55.89,Default,,0000,0000,0000,,They hold the body\Ntogether, give it shape,
Dialogue: 0,0:00:55.89,0:00:58.96,Default,,0000,0000,0000,,and protect its\Norgans and tissues.
Dialogue: 0,0:00:58.96,0:01:01.20,Default,,0000,0000,0000,,The skeleton also\Nprovides anchor points
Dialogue: 0,0:01:01.20,0:01:03.42,Default,,0000,0000,0000,,for the muscular\Nsystem, which includes
Dialogue: 0,0:01:03.42,0:01:05.31,Default,,0000,0000,0000,,three types of muscles--
Dialogue: 0,0:01:05.31,0:01:08.25,Default,,0000,0000,0000,,skeletal, smooth, and cardiac.
Dialogue: 0,0:01:08.25,0:01:11.40,Default,,0000,0000,0000,,They are found throughout the\Nbody and facilitate movement.
Dialogue: 0,0:01:11.40,0:01:14.82,Default,,0000,0000,0000,,Nestled within these muscles\Nis the cardiovascular system,
Dialogue: 0,0:01:14.82,0:01:17.98,Default,,0000,0000,0000,,a pipeline that includes\Nthe heart, blood vessels,
Dialogue: 0,0:01:17.98,0:01:19.68,Default,,0000,0000,0000,,and the blood itself.
Dialogue: 0,0:01:19.68,0:01:21.93,Default,,0000,0000,0000,,Also called the\Ncirculatory system,
Dialogue: 0,0:01:21.93,0:01:23.88,Default,,0000,0000,0000,,the cardiovascular\Nsystem delivers
Dialogue: 0,0:01:23.88,0:01:26.64,Default,,0000,0000,0000,,oxygen, white blood\Ncells, hormones,
Dialogue: 0,0:01:26.64,0:01:29.37,Default,,0000,0000,0000,,and nutrients\Nthroughout the body.
Dialogue: 0,0:01:29.37,0:01:33.00,Default,,0000,0000,0000,,Lastly, the nervous system\Nis a communication network
Dialogue: 0,0:01:33.00,0:01:35.16,Default,,0000,0000,0000,,of nerve cells\Nthat the body uses
Dialogue: 0,0:01:35.16,0:01:39.24,Default,,0000,0000,0000,,to transmit information and\Ncoordinate bodily functions.
Dialogue: 0,0:01:39.24,0:01:41.31,Default,,0000,0000,0000,,It's comprised of\Nthe brain, the hub
Dialogue: 0,0:01:41.31,0:01:45.21,Default,,0000,0000,0000,,of sensory and intellectual\Nactivity, the spinal cord,
Dialogue: 0,0:01:45.21,0:01:49.38,Default,,0000,0000,0000,,and the many cranial and spinal\Nnerves that emanate from them.
Dialogue: 0,0:01:49.38,0:01:53.70,Default,,0000,0000,0000,,This infrastructure, created\Nby neurons, blood, muscles,
Dialogue: 0,0:01:53.70,0:01:56.43,Default,,0000,0000,0000,,and bones allows\Nthree other systems
Dialogue: 0,0:01:56.43,0:01:59.76,Default,,0000,0000,0000,,to regulate the body's\Nenvironment-- the endocrine,
Dialogue: 0,0:01:59.76,0:02:02.97,Default,,0000,0000,0000,,lymphatic, and urinary systems.
Dialogue: 0,0:02:02.97,0:02:05.61,Default,,0000,0000,0000,,The endocrine system\Nis a series of glands
Dialogue: 0,0:02:05.61,0:02:08.91,Default,,0000,0000,0000,,that use information carried\Nby the nervous system
Dialogue: 0,0:02:08.91,0:02:12.12,Default,,0000,0000,0000,,to help regulate the\Nbody's processes.
Dialogue: 0,0:02:12.12,0:02:14.10,Default,,0000,0000,0000,,Thanks to this\Nneural connection,
Dialogue: 0,0:02:14.10,0:02:16.53,Default,,0000,0000,0000,,endocrine glands,\Nsuch as the thyroid,
Dialogue: 0,0:02:16.53,0:02:18.48,Default,,0000,0000,0000,,are aware of the\Namount of hormones
Dialogue: 0,0:02:18.48,0:02:20.97,Default,,0000,0000,0000,,and other chemicals\Nthey need to produce.
Dialogue: 0,0:02:20.97,0:02:23.73,Default,,0000,0000,0000,,These chemicals are then\Ndistributed throughout the body
Dialogue: 0,0:02:23.73,0:02:26.70,Default,,0000,0000,0000,,by way of the\Ncardiovascular system.
Dialogue: 0,0:02:26.70,0:02:28.95,Default,,0000,0000,0000,,The cardiovascular\Nand nervous systems
Dialogue: 0,0:02:28.95,0:02:32.10,Default,,0000,0000,0000,,are also utilized by\Nthe lymphatic system--
Dialogue: 0,0:02:32.10,0:02:34.20,Default,,0000,0000,0000,,a collection of lymph\Nnodes and vessels
Dialogue: 0,0:02:34.20,0:02:36.84,Default,,0000,0000,0000,,that help regulate\Nthe body's defenses.
Dialogue: 0,0:02:36.84,0:02:40.08,Default,,0000,0000,0000,,Also called the immune\Nsystem, the lymphatic system
Dialogue: 0,0:02:40.08,0:02:42.99,Default,,0000,0000,0000,,uses neural pathways\Nto transmit information
Dialogue: 0,0:02:42.99,0:02:45.09,Default,,0000,0000,0000,,about affected\Nareas of the body,
Dialogue: 0,0:02:45.09,0:02:48.09,Default,,0000,0000,0000,,and then sends out healing\Nagents, like white blood cells,
Dialogue: 0,0:02:48.09,0:02:50.61,Default,,0000,0000,0000,,via the bloodstream.
Dialogue: 0,0:02:50.61,0:02:54.24,Default,,0000,0000,0000,,Another key regulatory\Nsystem is the urinary system,
Dialogue: 0,0:02:54.24,0:02:58.83,Default,,0000,0000,0000,,which includes the kidneys,\Nureters, bladder, and urethra.
Dialogue: 0,0:02:58.83,0:03:01.98,Default,,0000,0000,0000,,The urinary, or renal\Nsystem, maintains
Dialogue: 0,0:03:01.98,0:03:04.80,Default,,0000,0000,0000,,the body's electrolyte\Nlevels and filters waste
Dialogue: 0,0:03:04.80,0:03:06.06,Default,,0000,0000,0000,,from the blood.
Dialogue: 0,0:03:06.06,0:03:08.46,Default,,0000,0000,0000,,This waste is sent\Nthrough the blood vessels,
Dialogue: 0,0:03:08.46,0:03:12.66,Default,,0000,0000,0000,,into the kidneys, and\Nthen expelled as urine.
Dialogue: 0,0:03:12.66,0:03:15.90,Default,,0000,0000,0000,,All of these systems\Nrequire energy to function,
Dialogue: 0,0:03:15.90,0:03:21.57,Default,,0000,0000,0000,,and that's where the respiratory\Nand digestive systems come in.
Dialogue: 0,0:03:21.57,0:03:25.47,Default,,0000,0000,0000,,The respiratory system is a\Ngroup of passageways and organs
Dialogue: 0,0:03:25.47,0:03:29.31,Default,,0000,0000,0000,,that extracts life-giving\Noxygen from the air we breathe.
Dialogue: 0,0:03:29.31,0:03:31.80,Default,,0000,0000,0000,,Air enters the body\Nthrough nasal cavities,
Dialogue: 0,0:03:31.80,0:03:35.89,Default,,0000,0000,0000,,travels down the throat, and is\Nthen transported to the lungs.
Dialogue: 0,0:03:35.89,0:03:37.80,Default,,0000,0000,0000,,The lungs extract\Noxygen for the body
Dialogue: 0,0:03:37.80,0:03:40.95,Default,,0000,0000,0000,,to use, and then expel a\Ncarbon dioxide byproduct
Dialogue: 0,0:03:40.95,0:03:42.39,Default,,0000,0000,0000,,when we exhale.
Dialogue: 0,0:03:42.39,0:03:45.66,Default,,0000,0000,0000,,Energy can also come\Nin the form of food.
Dialogue: 0,0:03:45.66,0:03:49.05,Default,,0000,0000,0000,,The digestive system is an\Napproximately 30-foot series
Dialogue: 0,0:03:49.05,0:03:52.12,Default,,0000,0000,0000,,of organs that convert\Nfood into fuel.
Dialogue: 0,0:03:52.12,0:03:54.48,Default,,0000,0000,0000,,Food enters the system\Nthrough the mouth,
Dialogue: 0,0:03:54.48,0:03:56.91,Default,,0000,0000,0000,,then moves into the\Nesophagus, the stomach,
Dialogue: 0,0:03:56.91,0:03:58.44,Default,,0000,0000,0000,,and the intestines.
Dialogue: 0,0:03:58.44,0:04:00.84,Default,,0000,0000,0000,,Nutrients are absorbed\Ninto the body,
Dialogue: 0,0:04:00.84,0:04:03.96,Default,,0000,0000,0000,,while solid waste is expelled\Nthrough the anal canal,
Dialogue: 0,0:04:03.96,0:04:07.17,Default,,0000,0000,0000,,the end of the digestive tract.
Dialogue: 0,0:04:07.17,0:04:09.87,Default,,0000,0000,0000,,No matter the role,\Nsize, or shape
Dialogue: 0,0:04:09.87,0:04:12.00,Default,,0000,0000,0000,,of any of the\Nbody's systems, each
Dialogue: 0,0:04:12.00,0:04:15.18,Default,,0000,0000,0000,,began with the\Nreproductive system.
Dialogue: 0,0:04:15.18,0:04:18.48,Default,,0000,0000,0000,,This system is responsible\Nfor creating life.
Dialogue: 0,0:04:18.48,0:04:21.87,Default,,0000,0000,0000,,The primary organs involved\Ndiffer between the sexes,
Dialogue: 0,0:04:21.87,0:04:25.36,Default,,0000,0000,0000,,with ovaries, fallopian\Ntubes, the uterus, and vagina
Dialogue: 0,0:04:25.36,0:04:29.79,Default,,0000,0000,0000,,found in women, and testes and\Na sperm channel found in men.
Dialogue: 0,0:04:29.79,0:04:33.84,Default,,0000,0000,0000,,Together, fertilization may\Noccur, organ systems form,
Dialogue: 0,0:04:33.84,0:04:37.11,Default,,0000,0000,0000,,and then a child is born.
Dialogue: 0,0:04:37.11,0:04:40.83,Default,,0000,0000,0000,,Humans are\Ncomplicated organisms.
Dialogue: 0,0:04:40.83,0:04:44.46,Default,,0000,0000,0000,,But when our 10 major\Norgan systems are healthy,
Dialogue: 0,0:04:44.46,0:04:46.08,Default,,0000,0000,0000,,they ensure our well-being.
Dialogue: 0,0:04:46.08,0:04:50.03,Default,,0000,0000,0000,,[MUSIC PLAYING]