Phosphorus deficiency. 1  Symptoms: Slow growth and dull yellow foliage. 2  Cause: Phosphorus is needed for healthy roots and shoot growth. 3  Soil shortages of phosphorus are rare, but may occur in areas with high rainfall and heavy clay soil. 4  Remedy: Apply fertilisers such as superphosphate or bone meal.
Smooth muscle is an involuntary non-striated muscle. It is divided into two subgroups; the single-unit (unitary) and multiunit smooth muscle. Within single-unit cells, the whole bundle or sheet contracts as a syncytium (i.e. a multinucleate mass of cytoplasm that is not separated into cells).mooth muscle is found within the walls of blood vessels (such smooth muscle specifically being termed vascular smooth muscle) such as in the tunica media layer of large (aorta) and small arteries, arterioles and veins.
1. The structure of the smooth muscle tissue is quite different from that of other muscle tissue subtypes. The primary smooth muscle structural and functional unit â the smooth muscle myocyte (Myocytus nonstriatus) has unique structure, arrangement and innervation.The spindle shape of the mononucleated smooth muscle cell permits a close contact among cells in the splanchnic and vascular walls.he primary smooth muscle structural and functional unit â the smooth muscle myocyte (Myocytus nonstriatus) has unique structure, arrangement and innervation. The spindle shape of the mononucleated smooth muscle cell permits a close contact among cells in the splanchnic and vascular walls.