Rat Dissection
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Transcript of Rat Dissection
Dissection Guide to the Rat
The Norway rat (Rattus norvegicus)
Rat Dissection
Scientific Name: Rattus norvegicus
Common Name: Rat
Kingdom- Animalia Phylum- Chordata Subphylum- Vertebrata Class- Mammalia Order- Rodentia Family: Muridae
RATS
Anatomical Terms
Cranial-toward the head Caudal-toward the tail Dorsal-toward the backbone Ventral-toward the belly side Lateral-toward the side Medial-toward the middle Proximal: closer to the the base of a structure Distal: farther away from a structure
External Anatomy
• The body is long and cylindrical:
• Head, neck, trunk, anterior limbs, posterior limbs, tail.
External Anatomy
• Head: eyes, nostrils, external ears (auriculars), mouth, whiskers.
• Neck: (head , trunk).• Trunk: (thorax, abdomen).• Ant. limbs: 4 digits• Post. limbs: 5 digits
Rat Dissection REMOVING SKIN
XX
Rat Dissection REMOVING SKIN
Rat Dissection REMOVING SKIN
Rat Dissection
Digestive System
Lesson One
Rat Dissection ORAL CAVITY
Rat Dissection ORAL CAVITY
Rat Dissection ABDOMINAL
CAVITY
Rat DissectionDIGESTIVE ORGANS
Rat DissectionDIGESTIVE ORGANS
Rat DissectionDIGESTIVE ORGANS
Rat DissectionDIGESTIVE ORGANS
Rat DissectionDIGESTIVE ORGANS
Rat Dissection
Urinogenital System
Lesson Two
Rat DissectionEXCRETORY
ORGANS
Rat DissectionUROGENITAL
ORGANS
Rat Dissection
1. Stomach2. Kidney3. Ovary4. Oviduct5. Uterine Horn6. Rectum7. Urinary Bladder
FEMALE REPRODUCTIVE ORGANS
Rat Dissection
1. Coagulating Gland2. Urinary Bladder3. Vas Deferens4. Epididymis5. Small Intestines6. Seminal Vesicle7. Prostate Gland8. Penis9. Testis10.Scrotum
MALE REPRODUCTIVE ORGANS
Key words and Functions:Key words and Functions:
Seminal vesicleSeminal vesicle: secrete thick liquid to transport sperms.
Coagulating glandCoagulating gland: is to secrete fluids to form the copulatory plug to help ensure fertilization.
Prostate glandProstate gland: secrets thin alkaline solution. Vas deferensVas deferens: transportation, ejaculation. EpididymisEpididymis: transportation, maturation, ejac.
Cowper’s gland: Cowper’s gland: secretions may lubricate, flush out urine or form gelatinous plug.
The preputial glandsThe preputial glands: produce pheromones. The preputial glands of female animals are
sometimes called clitoral glands.clitoral glands. TestisTestis: sperm production. PenisPenis: Copulation. ScrotumScrotum: protection.
Rat Dissection
Circulatory System
Lesson Three
Rat Dissection HEART
1. Blue is deoxygenated blood (from the body, going to the lungs)
2. Red is oxygenated blood (from the lungs, going to the body)
3. Arteries are thick walled
4. Veins are thin walled
To LUNGS
To LUNGS
From LUNGSFrom LUNGS
From BODY
From BODY
To BODY
Rat Dissection
1. Trachea2. Heart3. Lung4. Diaphragm
THORACIC CAVITY
Rat DissectionRESPIRATORY
ORGANS
Carotid
Jugular
Esophagus
Rat Dissection HEART + LUNGS
Arterial System
Venous System
Venous System
Rat Dissection
1. Abdominal Aorta2. Renal Artery (left)3. Renal Vein (left)4. Inferior Vena Cava5. Hepatic Portal
Vein
ABDOMINAL CIRCULATION
Rat Dissection
Endocrine System
Lesson Four
Organizational Levels of the Nervous System
Central Nervous System (CNS): Brain and Spinal Cord Control and Integration Center
Peripheral Nervous System (PNS): Nerves from brain and spinal cord Communication lines between CNS and rest of body
Sensory (afferent) Division Body Receptors Sends stimulus from receptors to CNS
Motor (efferent) Division Motor Neurons Sends stimulus from CNS to muscles (and glands)
Autonomic Nervous System Involuntary Control Conducts impulses from the CNS to involuntary muscles
Somatic Nervous System Voluntary Control Sends stimulus from CNS to skeletal muscles
Sympathetic Division Fight or Flight Mobilizes involuntary systems during emergencies
Parasympathetic Division Resting and Digesting Promotes non-emergency involuntary functioning