Key points. 1  Humansâand other complex multicellular organismsâhave systems of organs that work together, carrying out processes that keep us alive. 2  The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems.
The rose was designated as the official state flower of New York in 1955. The rose is a symbol of love and beauty (as well as war and politics) the world over.
Spring bloom in Central Park. Mitchell Funk/Photographer's Choice/Getty Images. April in NYC | New York City Calendar | June in NYC. May is a great time to visit New York City -- Spring is in full swing, which makes it very comfortable to be outside.Temperatures are comfortable for walking, exploring and picnicking, and the throngs of summer tourists haven't yet invaded the city's museums and attractions, so crowds tend to be smaller. Average Low: 55Â°F (13Â°C). 2  May offers great weather for visiting New York City -- it's warm enough to spend a lot of time walking around, but cool enough to remain comfortable.