Brain
- The chordate brain is divided into three main parts: the prosencephalon (forebrain) mesecephalon (midbrain) and rhombencephalon (hindbrain)
- Each of these three parts of the brain in primitive associated with the three main senses, olfaction (forebrain) vision (midbrain) and the acustive lateralis system (hindbrain)
Testis Histology
Video about histology of testes including spermatogonia, spermatocyte, spermatid
. Basic histology of testes.
Histology Application
This is the very good application for science and medicine faculty students Lot of images and the quality of the sharp images with excellent resolution and short description about image available. Free application vers. has limited views and need an internet connection to view them.
Muscle Vasculature
Capillaries found in endomysium and larger arteries and veins in skeletal muscle in through the perimysium. Blood vessels flow through, and only through, connective tissue. This is the perimysium between two groups of skeletal muscle fibers. 
pathguy.com
circulatory system
The function of circulatory system : transport of respiratory gases, hormone distrubition, heat distrubution, immune defence. Circulatory system has three essential components; a circulating fluid, a vascular system and heart. Lower metazoans lack a body cavity and do not have an internal circulatory system. Coelentrate do not have also an internal circulatory system because their body wall is very thin.
The body cavity of higher pseudocoelomate and coelomate animals contains a coelomic fluid. Some of the coelomate animalssuch as crustaceans, the vascular system is mesodermal tube that partially seperates thee blood from hemocoel.
A heart may be present to propel hemolymph through the vessels. In other some coelomate animals, the ceolom completely seperated from coelom. The closed circulatory system have a complete system of vessels and the blood is completely seperate and has a ddifferent composition from the interstitial fluid.
vertebrate digestive system histology
The vertebrate digestive tract, like that of invertebrates, is highly specialized in both structure and function for the digestion of a wide array of food. The basic components of the gut tube include the buccal cavity, pharynx, esophagus, stomach, small intestine, large intestine, rectum, anus/cloaca. A few vertebrates lack a stomach (cyclostomes, lungfish) but in most it functions for storage and acidic/enyzmatic digestion.
it is modified for fermentation in ruminant and pseudoruminant mammals. Absorbtion is the primary function of the small intestine in higher vertebrates, although some absorbtion occurs in the stomach and large intestine. There are three important glandular systems in vertebrate digestive system.
1-The salivary glands
2-The liver, gallbladder and bile duct
3-Pancreas and pancreatic duct
The liver is a large organ that secretes bile fluid.
Some mammals lack a gallbladder. Cephalochordates and cyclostomes lack a pancreas.
The large intestine of mammals is generally more developed than other vertebrates, is responsible for water reabsorbtion and formation of feces. Bacterial action in the hindgut can ferment cellulose and can synthesize vitamins. source: histology