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58 terms

Rat Dissection Anatomy

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Ears
sensory organ that can distinguish pitch and loudness of vibrations in the air around us
Whiskers
specialized hairs that are used for feeling around in the dark
Nostrils
allows air to flow into body, and is an opening in nose, sense of smell
Anus
external opening of the rectum, part of excretory system, controls the expulsion of feces and waste
Tail
flexible appendage that functions as way to balance and as a heat loss organ
Claws
used to fend off prey to protect themselves and to get food and compete with other rats
Teeth
part of digestive system, chew up food, gnawing ability in rats
Testicles
male reproductive gland that produce and store sperm
Muscles
Three difference types of muscle (smooth, skeletal, cardiac), voluntary movements, involuntary movements, and in the heart
Bones
support the body, protects internal organs, movement, mineral reserves, blood formation
Tendons
connect muscles to bones and are a form of connective tissue
Ligaments
connect bone to hold the bones together
Peritoneum
covers the abdominal organs, membrane that forms the lining of the abdominal cavity
Mesentery
membrane that surrounds and supports the digestive system
Vasculature
blood vessels that are a part of circulatory system
Fat
saturated and unsaturated fats, stored energy for organism
Liver
produces bile that dissolves and disperses fat, allowing enzymes to reach the fat
Spleen
store red and white blood cells, part of the lymphatic system
Diaphragm muscle
large flat muscle that allows for breathing by contracting and expanding and changing the volume of the chest cavity
Stomach
continues mechanical digestion of food with contractions of smooth muscle, contains mucus, hydrochloric aced and enzyme pepsin
Pylorus
muscle in stomach that connects to the duodenum
Esophagus
food tube tat leads to the stomach where bolus passes through, moves through peristalsis
Pyloric sphincter
a muscular valve that lets food pass from the stomach to the duodenum
Small intestine
adapted to absorb nutrients with projections called villi
Duodenum
first section of small intestine where the stomach joins the small intestine
Large intestine
removes water from undigested materials called feces
Pancreas
controls blood sugar levels with hormone commands to the leaver
Kidneys
excrete waste, filter blood, and regulate the pH levels of the blood, remove urine and water from body
Abdominal Aorta
is a portion of the descending aorta that carries oxygenated blood to bottom part of the body
Inferior Vena Cava
takes deoxygenated blood from the bottom of body and brings it to heart
Adrenal glands
release many hormones
Urinary bladder
saclike organ where urine is stored before it is excreted
Ureters
tube that leaves kidney and carries urine to urinary bladder
Urethra
tube where urine exits the body, as well as sperm
Ovaries
produce egg cells in females
Oviducts
passageway from ovary to outside of the body
Uterus
sex organ that connects the vagina to the urogenital opening, where fetus develops
Vagina
tract that leads from uterus to outside of the body
Scrotum
skin and muscle that contain the testes
Epididymis
stores sperm and leads to vas deferens
Vas deferens
tube that attaches to the urethra and carries sperm from epididymis
Urethra
carries sperm out of the body through the penis
Penis
male reproductive organ that releases sperm and urine
Prostate
release alkaline fluid that constitutes much of the volume of semen
Membranes
barrier of an organ, lubricated surface, allow two sets of organs to move vigorously without wearing each other away
Pericardium
protective sac of tissue that covers the heart
Lungs
where blood picks up oxygen and gets rid of carbon dioxide
Lobes
a division of a bodily organ
Right Atrium
receives blood from the superior and inferior vena cavas
Left atrium
receives freshly oxygenated blood from the lungs via the pulmonary vien
Left ventricle
sends oxygenated blood out the descending and ascending aortas to the body
Vena Cavas
veins that take the deoxygenated blood towards the heart and bring to right atrium
Pulmonary Vein
takes oxygenated blood from the lungs to the heart (left atrium)
Ascending and Descending Aorta
carries oxygenated blood from heart to the rest of the body
Coronary arteries
blood vessels across the heart that branch off the aorta and feed the heart muscle
Thymus gland
helps the immune system develop and recognize what is an enemy and what is not
Trachea
wind pipe that transports air
Bronchi
leads to one of the lungs, subdivide into bronchioles, then subdivide until the reach the tiny air sacs called alveoli