The circulatory system is a system or network in the body that consist of blood, blood vessels i.e arteries and veins , microvessels, lymph vessels and the heart. They are lined by simple squamous epithelium tissue, these tissue is one cell thick layer of flattened cells. These type of cells are flat with flattened nuclei and are permeable, that is they allow the passage of small molecules through filtration and diffusion. The circulatory system help to circulate blood through out the body from the heart.
The circulatory system is lined by a simple squamous epithelium which is a one cell thick layer of flattened cells. It allows for passage of small molecules through the process of filtration and diffusion, The kind of epithelium is found in areas that require rapid diffusion of substances such as capillaries, alveoli, glomeruli of nephron. This epithelium is one celled to the basal lamina and contains flat cells.
The veinlets form a network in the leaf lamina that is why the type of venation reticulate meaning network. So all dicots have dicotyledonous seeds, a tap root system and leaves with reticulate venation. ( with some exceptions of dicots having parallel venation in leaves like Calophyllum)
Chemical weathering changes the composition of rocks, often transforming them when water interacts with minerals to create various chemical reactions. Chemical weathering is a gradual and ongoing process as the mineralogy of the rock adjusts to the near surface environment.
