There are quite a few animals that contain tissues but lack complex organs. One of these animals is the jellyfish.
according to McGraw-Hill, an organ is more complex, learned from my anatomy homework
The phylum Porifera contains the simplest animals, known as sponges. Sponges lack tissues and organs, and their body structure is very basic compared to other animal phyla.
No, the levels of complexity do not necessarily decrease when moving from tissues to organs. Organs are made up of multiple different types of tissues that work together to perform specific functions, so the level of complexity can actually increase as you move up from tissues to organs. Organs are typically more complex than tissues because they have specialized structures and functions.
The body's level of organization from least complex to most complex is as follows: cells, tissues, organs, organ systems, and the whole organism. Cells are the basic structural and functional units, which combine to form tissues, then organs, and ultimately organ systems that work together to support the entire organism.
The correct order of levels of organization in a complex organism is cells, tissues, organs, organ systems, and then the organism as a whole. This hierarchy represents how individual cells work together to form tissues, tissues form organs, and organs work together in organ systems to support the overall function of the organism.
The hierarchy of complexity from most complex to least complex is: systems (e.g., digestive system), organs (e.g., heart), tissues (e.g., muscle tissue), and cells (e.g., muscle cells). Systems are made up of multiple organs, organs are comprised of tissues, and tissues are composed of cells.
The structures of the human body in order from least to most complex are cell, tissue, organ, and organ system.
There may be several tissues in an organ but a tissue does not have many organs
The correct sequence of bodily organization from simple to complex is: cells -> tissues -> organs -> organ systems -> organism. Cells are the basic building blocks of the body, which come together to form tissues. Tissues then combine to form organs, organs work together to form organ systems, and all the organ systems together make up a complete organism.
More complex organisms including plants and animals are called multicellular organisms. These organisms are made up of different types of specialized cells that work together to form tissues, organs, and organ systems.
Cells, Tissues, Organs, Organ Systems, Organisms.
Cells Tissues Organs Organ System Organisms