Tag: anatomy
The brain stem of the sheep is located on the ventral surface of the brain. Visible features include the olfactory lobe, optic chiasma, pituitary stalk (infundibulum), midbrain, pons, medulla oblongata and the spinal cord. The image below shows the brain of the sheep with the dura mater removed.
The radial notch is found on the ULNA and articulates with the head of the radius to form a pivot joint. It is located to the lateral side of the coronoid process. The coronoid and olecranon process articulate with the humerus to form the hinge joint of the …
Most anatomy textbooks begin with descriptions of body cavities and body regions. These terms are important for identifying the location of structures. For example, you will fund the lungs within the thoracic cavity, which is the region superior to the diaphragm. The stomach and digestive organs are …
The spleen is involved in the immune system and is responsible for removing old blood cells. It sits under the rib cage in humans on the left side of the abdomen. In the cat, the spleen is an elongated structure that is often reddish-brown in color on preserved …
In February of 2016, model Katie May died suddenly after a visit to a chiropractor. The official cause of death was “vertebral artery dissection.” During spinal manipulation, the artery which supplies blood to brain was damaged. The brain’s arteries circle the brain around the pituitary gland consisting …
Heart models can be useful for learning the structure of the heart, particularly when paired with a dissection. They can be purchased at a reasonable cost at Amazon, usually mounted in a way that you can see the external and internal anatomy. When doing the dissection of …
In cats and many animals that have multiple embryos, the uterus is divided into two sides called the uterine horns. The ovary can be found at the end of each horn. In humans, this structure is homologous to the Fallopian Tubes. The photo below shows only the right …
Renal pyramids are triangular shaped areas seen on a cross section of the kidney. They appear striped due to the thousands of nephrons within them that make up the functional unit of the kidney. The nephrons perform the function of filtration of waste products from the blood and …
The chordae tendinae are tiny tendons that connect the valves of the heart to the papillary muscle. They appear as small white strings and are sometimes referred to as the “heart strings.” In the photo below the right ventricle has been cut and the chordae shown are attached to …
The larynx is also known as the voice box and it can easily be found in the throat of mammal specimens (fetal pig shown below.) The larynx contains the vocal cords that are used for making sounds. In humans the location of the larynx allows for diverse sounds …
The bicuspid and tricuspid valves are both located between the atrium and the ventricle. They are similar in appearance and can be difficult for beginning anatomists to identify accurately. There are a couple of different ways to remember and then locate the valves. First, you must remember …
The cerebellum is located at the posterior end of the brain and is associated with motor control, balance and coordination. It is only loosely attached to the cerebrum, and dissections of the brain reveal that removing the dura mater often result in the accidental removal of the cerebellum. …
Often students mistake the pulmonary artery for the aorta. The pulmonary artery, or pulmonary trunk, is the most anterior vessel found on the heart; it is indicated below with a blue pencil. The aorta lies behind the pulmonary trunk, indicated with the red pencil. When the heart is …
The vitreous humor is the clear gel that fills the space between the lens and the retina. On the cow eye, this can usually be removed in a single clump of thick liquid, unlike the aqueous humor which is thin and watery. Most eye floaters are caused by …
1. Auricle 2. External Auditory Meatus 3. Tympanic Membrane 4. Tympanic Cavity 5. Round Window 6. Eustachian Tube 7. Cochlea 8. Vestibulocochlear nerve 9. Semicircular canals 10. Stapes 12. Incus 13. Malleus 15. Outer Ear 16. Middle Ear 17. Inner Ear
The pituitary gland, also called the hypophysis, is associated with the endocrine system. It it located on the ventral side of the brain attached to the hypothalamus. Under the direction of the brain, the pituitary gland controls the secretion of hormones that regulate growth, blood pressure, sexual …
This bisected brain shows the major features of the midbrain and brain stem. The corpus callosum is just been the cortex of the brain and connects the left and right hemispheres. The lateral ventricle is a fluid filled space found below the corpus callosum and just about …
The cerebrum and cerebellum of the brain are divided by the transverse fissure. The left and right hemispheres of the brain are divided by the longitudinal fissure. A fissure is a groove or a natural division, and with the brain are divide major regions. Sulci (singular: sulcus) are …
